SBE 16plus V2 CTD Recorder

SBE 16plus V2 SeaCAT C-T (P) Recorder

Moored Conductivity, Temperature, (optional) Pressure, and up to seven auxiliary sensors, at user-programmable intervals.

SUMMARY

  • Conductivity, Temperature, Pressure (optional), and up to seven auxiliary sensors, at user-programmable intervals (10 seconds to 4 hours).
  • RS-232 serial interface, internal memory, and internal batteries (can be powered externally).
  • Expendable anti-foulant devices and optional pump for maximum bio-fouling protection.
  • Depths to 600, 7000, or 10,500 meters.
  • Adds to Sea-Bird's SeaCAT family, field-proven since 1987.
  • Five-year limited warranty.

DESCRIPTION

The SBE 16plus V2 (Version 2) SeaCAT Recorder measures temperature and conductivity (pressure optional) and provides high accuracy and resolution, reliability, and ease-of-use on moorings and other long-duration, fixed-site deployments. Compared to the previous 16plus, the V2 incorporates an electronics upgrade and additional features, with six differentially amplified A/D input channels, one RS-232 data input channel, and 64 MB FLASH memory. Data can be output in XML as well as ASCII and HEX formats. Firmware upgrades can be downloaded through the communications port, without opening the instrument.

The SBE 16plus V2 uses the same temperature and conductivity sensors (and optional strain gauge or Digiquartz® pressure sensor) proven in 10,000 SeaCATs and MicroCATs. The unique internal-field conductivity cell permits the use of expendable anti-foulant devices, for long-term bio-fouling protection.

Calibration coefficients, stored in memory, permit data output in ASCII engineering units (degrees C, Siemens/m, decibars, salinity [PSU], sound velocity [m/sec.], etc.). The sample interval, ranging from 10 to 14,400 seconds, is user-programmable in 1-second increments. Between samples, the SBE 16plus V2 powers down, drawing only 20 microAmps. Nine alkaline D-cells provide power for 355,000 samples of C and T. Conditioned power (500 mA) is available for auxiliary sensors (dissolved oxygen, turbidity, fluorescence, PAR, etc.). Data is recorded in memory for 38.4K baud upload after recovery.

Real-time monitoring is practical using the SBE 16plus V2 3-wire RS-232C data output. The 16plus V2 is well suited to networked sensor arrays where its operation can be triggered by satellite, radio, or hardwire telemetry equipment. An optional inductive modem (1-wire loop) interface allows multiple SeaCATs to share a simple and robust telemetry cable.

CONFIGURATION, OPTIONS, AND ACCESSORIES

A standard SBE 16plus V2 is supplied with plastic housing for depths to 600 meters, 64 Mbyte FLASH RAM memory, alkaline batteries, glass-reinforced epoxy bulkhead connectors, and expendable anti-foulant devices.

Options and accessories include:

SOFTWARE

The SBE 16plus V2 is supplied with a powerful Windows 2000/XP software package, Seasoft©V2, which includes programs for communication and data retrieval, real-time data acquisition and display, and data processing (filtering, aligning, averaging) and plotting of CTD and auxiliary sensor data and derived variables.

        Measurement
Range
    Initial Accuracy     Typical Stability     Resolution  
Conductivity (S/m) 0 - 9 ± 0.0005 0.0003/month 0.00005 typical
Temperature (°C) -5 to +35 ± 0.005 0.0002/month 0.0001
Pressure (optional)
Strain-Gauge
0 to 20 / 100 / 350 / 600 / 1000 / 2000/ 3500 / 7000 meters ± 0.1% of full scale range 0.1% of full scale range/year 0.002% of full scale range
Pressure (optional)
Quartz
0 to  20 / 60 / 130 / 200 / 270 / 680 / 1400 / 2000 / 4200 / 7000 / 10500 meters ± 0.02% of full scale range 0.02% of full scale range/year Depends on sample integration time; 0.0006% of full scale range for 1-second integration

 

Memory: 64 Mbyte non-volatile FLASH memory

Data Storage:   

  Recorded Parameter     Bytes/Sample  
T + C 6
Pressure — strain-gauge or Quartz 5
each external voltage 2
auxiliary RS-232 sensor sensor dependent
date and time 4

 

Real-Time Clock: 32,768 Hz TCXO accurate to ±1 minute/year

Internal Batteries: 9 alkaline D-cells

External Power Supply: 9 - 28 VDC; consult factory for required current

Battery Endurance 1:
CT only: 355,000 samples
CTD only: 240,000 samples
CTD & 5M pump: 140,000 samples
1 With Duracell MN 1300 cells. Dependent on sampling scheme.

Auxiliary Voltage Sensors:
Auxiliary power out: up to 500 mA at 10.5 - 11 VDC
A/D resolution: 14 bits
Input range: 0 - 5 VDC

Depth Rating, Housing, and Weight:

Depth Rating Housing Material Weight in air Weight in water
600 m (1950 ft) acetal copolymer plastic 7.3 kg (16 lbs) 2.3 kg (5 lbs)
7000 m (22,900 ft) 3AL-2.5V titanium 13.7 kg (30 lbs) 8.6 kg (19 lbs)
10500 m (34,400 ft) 6AL-4V titanium    

 

 

The list below includes (as applicable) the current product brochure, manual, and quick guide; software manual(s); and application notes.

For older SBE 16plus V2 product manuals, organized by instrument firmware version, click here.

Title Type Publication Date PDF File
SBE 16plus V2 Brochure Product Brochure Monday, September 24, 2012 16plusV2brochureSep12.pdf
SBE 16plus V2 Manual Product Manual Monday, September 30, 2013 16plusV2_rs232_011.pdf
Seasave V7 Manual Software Manual Tuesday, March 18, 2014 Seasave_7.23.2.pdf
SBE Data Processing Manual Software Manual Tuesday, March 18, 2014 SBEDataProcessing_7.23.2.pdf
SBE 16plus V2 Quick Guide Product Quick Guide Thursday, May 3, 2012 16plusV2_rs232_ReferenceSheet_006.pdf
Seasave V7 Quick Guide Software Quick Guide Tuesday, August 3, 2010 Seasave_ReferenceSheet_001.pdf
AN02D: Instructions for Care and Cleaning of Conductivity Cells Application Notes Monday, March 10, 2014 appnote2DMar14.pdf
AN06: Determination of Sound Velocity from CTD Data Application Notes Tuesday, February 2, 2010 appnote06Aug04.pdf
AN10: Compressibility Compensation of Sea-Bird Conductivity Sensors Application Notes Tuesday, May 7, 2013 appnote10May13.pdf
AN12-1: Pressure Port Oil Refill Procedure and Nylon Capillary Fitting Replacement Application Notes Friday, September 12, 2008 appnote12-1Sep08.pdf
AN14: 1978 Practical Salinity Scale Application Notes Thursday, January 12, 1989 appnote14.pdf
AN16: Entering Calibration Coefficients for D&A Instruments (Campbell Scientific) OBS-3 Optical Backscatter Sensor Application Notes Thursday, September 18, 2014 appnote16Sep14.pdf
AN27D: Minimizing Strain Gauge Pressure Sensor Errors Application Notes Thursday, February 13, 2014 appnote27DFeb14.pdf
AN31: Computing Temperature and Conductivity Slope and Offset Correction Coefficients from Laboratory Calibrations and Salinity Bottle Samples Application Notes Monday, February 22, 2010 appnote31Feb10.pdf
AN34: Instructions for Use of Conductivity Cell Filling and Storage Device PN 50087 and 50087.1 Application Notes Saturday, October 13, 2012 appnote34Oct12.pdf
AN42: ITS-90 Temperature Scale Application Notes Thursday, February 13, 2014 appnote42Feb14.pdf
AN57: Connector Care and Cable Installation Application Notes Tuesday, May 13, 2014 appnote57Jan14.pdf
AN64-1: Plumbing Installation - SBE 43 DO Sensor and Pump on a CTD Application Notes Wednesday, April 16, 2008 appnote64-1Apr08.pdf
AN67: Editing Sea-Bird .hex Data Files Application Notes Monday, October 15, 2001 appnote67.pdf
AN68: Using USB Ports to Communicate with Sea-Bird Instruments Application Notes Friday, October 19, 2012 appnote68Oct12.pdf
AN69: Conversion of Pressure to Depth Application Notes Monday, July 1, 2002 appnote69.pdf
AN71: Desiccant Use and Regeneration (drying) Application Notes Wednesday, January 15, 2014 Appnote71Jan14.pdf
AN72-V2: Setting Up WET Labs ECO Sensor with Bio-Wiper™ for integration with SeaCATplus V2 CTDs (SBE 16plus V2, 16plus-IM V2, 19plus V2) Application Notes Tuesday, April 15, 2014 Appnote72-V2Apr14.pdf
AN73: Using Instruments with Pressure Sensors at Elevations Above Sea Level Application Notes Friday, February 28, 2014 appnote73Feb14.pdf
AN83: Deployment of Moored Instruments Application Notes Friday, February 14, 2014 appnote83Feb14.pdf
AN84: Using Instruments with Druck Pressure Sensors in Muddy or Biologically Productive Environments Application Notes Tuesday, January 14, 2014 appnote84Jan14.pdf
AN90: Absolute Salinity and TEOS-10: Sea-Bird's Implementation Application Notes Tuesday, September 3, 2013 AppNote90Sep13.pdf
Deployment Endurance Calculator is an aid for quickly determining the maximum deployment length for a moored instrument, based on battery capacity. Deployment Endurance Calculator is part of our Seasoft V2 software suite.
Version 1.6 released September 2, 2014
DeploymentEnduranceCalcV1_6.exe for Windows XP/Vista/7


SeatermV2© is a terminal program launcher for setup and data upload of Sea-Bird instruments developed or redesigned in 2006 and later. The common feature of this generation of instruments is the ability to output status responses in XML. SeatermV2 is part of our Seasoft V2 software suite.
Version 2.4.1 released September 2, 2014
SeatermV2_4_1.exe for Windows XP/Vista/7


Seasave V7© acquires, converts, and displays real-time or archived raw data from Sea-Bird profiling CTDs and thermosalinographs, as well as the SBE 16 family of moored CTDs. Seasave V7 is part of our Seasoft V2 software suite.
Version 7.23.2 released March 18, 2014
SeasaveV7_23_2.exe for Windows XP/Vista/7


SBE Data Processing© consists of modular, menu-driven routines for converting, editing, processing, and plotting of oceanographic data acquired with Sea-Bird profiling CTDs, thermosalinographs, and the SBE 16 and 37 families of moored CTDs. SBE Data Processing is part of our Seasoft V2 software suite.
Version 7.23.2 released March 18, 2014
SBEDataProcessing_Win32_V7_23_2.exe for Windows XP/Vista/7


What are the recommended practices for connectors - mating and unmating, cleaning corrosion, and replacing?

Mating and Unmating Connectors:

It is important to prepare and mate connectors correctly, both in terms of the costs to repair them and to preserve data quality. Leaking connectors cause noisy data and even potential system shutdowns. Application Note 57: Connector Care and Cable Installation describes the proper care and installation of connectors for Sea-Bird instruments. The Application Note covers connector cleaning and cable or dummy plug installation, locking sleeve installation, and cold weather tips.

Checking for Leakage and Cleaning Corrosion on Connectors:

If there has been leakage, it will show up as green-colored corrosion product. Performing the following steps can usually reverse the effect of the leak:

  1. Thoroughly clean the connector with water, followed by alcohol.
  2. Give the connector surfaces a light coating of silicon grease.

Re-mate the connectors properly — see Application Note 57: Connector Care and Cable Installation and 9-minute video covering O-ring, connector, and cable maintenance.

Replacing Connectors:

  • The main concern when replacing a bulkhead connector is that the o-rings on the connector and end cap must be prepared and installed correctly; if they are not, the instrument will flood. See the question below for general procedure on handling o-rings.
  • Use a thread-locking compound on the connector threads to prevent the new connector from loosening, which could also lead to flooding.
  • If the cell guard must be removed to open the instrument, take extra care not to break the glass conductivity cell.

I am ordering a CTD and want to use auxiliary sensors. Should I order them from Sea-Bird also, or deal directly with the sensors’ manufacturers?

This depends on your own expertise and resources. We have extensive experience in integrating and supporting a wide range of auxiliary sensors, but not everything under the sun. We have a large list of commonly used sensors that we routinely offer for sale (see Third Party Sensor Configuration).

When you purchase any of these auxiliary sensors from Sea-Bird, we are able to apply this experience to integrating the sensors with the CTD. The integration includes installing the sensors (with appropriate mounting kits and cables) in a manner that puts each sensor in the best possible orientation for optimum performance. It also includes configuring the CTD system and software to accept the sensors’ inputs and properly display the data, and testing the entire system, typically in a chilled saltwater bath overnight, to confirm proper operation. Having done the integration, we also support the entire system in terms of follow-on service and end-user support with operational and data analysis questions *. There is significant added value in our integration service, and there is some extra cost for this, compared to doing it yourself. However, we do not base our business on selling services, and the prices charged for Third Party sensors carry minimal mark-ups that vary depending on the pricing we are offered by the manufacturers. In some cases we can sell at the manufacturer's list price, and in others we have to add margin.

*Notes:
1. As described in our Warranty, auxiliary sensors manufactured by other companies are warranted only to the limit of the warranties provided by their original manufacturers (typically 1 year).
2. Click here for information on repairing / recalibrating auxiliary sensors manufactured by other companies.

What are the recommended practices for inspecting, cleaning, and replacing o-rings?

Inspecting and Cleaning O-Rings and Mating Surfaces:

  1. Remove any water from the o-rings and mating surfaces with a lint-free cloth or tissue.
  2. Visually inspect the o-rings and mating surfaces for dirt, nicks, cuts, scratches, lint, hair, and any signs of corrosion; these could cause the seal to fail. Clean the surfaces, and clean or replace the o-rings as necessary.
  3. Apply a light, even coat of 100% silicon o-ring lubricant (Parker Super O Lube) to the o-rings and mating surfaces. For an end cap o-ring, a ball of lubricant the size of a pea is about all that is needed. Too much lubricant can cause the seal to fail as much, if not more, than no grease. Do not use petroleum-based lubricant (car grease, Vaseline, etc.), as it will cause premature failure of the rubber.
    CAUTION: Parker makes another product, Parker O Lube, that is petroleum-based. Do not use this product; verify that you are using Parker Super O Lube.
  4. After lubricating the o-ring, immediately reassemble the end cap or connector, verifying that no hairs or lint have collected on the lubricated o-ring.

Replacing O-Rings:

  • End Cap O-Rings: We recommend scheduled replacement of end cap o-rings approximately every 3 years, to prevent leaks caused by normal o-ring wear.
  • Connector O-Rings: Replacing connector o-rings requires de-soldering and re-soldering the connector wires, which makes it a more difficult task. Therefore, we recommend replacement of connector o-rings when needed, not on a routine, scheduled basis.

Additional Information:

  • 9-minute video covering O-ring, connector, and cable maintenance.
  • Short, silent video of application of lubricant to o-ring.
  • Short, silent video of application of lubricant to o-ring mating surface (note the use of a plastic dental syringe — no sharp points to scratch the housing — to apply the lubricant).

How often do I need to have my instrument and/or auxiliary sensors recalibrated? Can I recalibrate them myself?

General recommendations:

  • Profiling CTD — recalibrate once/year, but possibly less often if used only occasionally. We recommend that you return the CTD to Sea-Bird for recalibration. (In principle, it is possible for calibration to be performed elsewhere, if the calibration facility has the appropriate equipment andtraining. However, the necessary equipment is quite expensive to buy and maintain.) In between laboratory calibrations, take field salinity samples to document conductivity cell drift.
  • Thermosalinograph — recalibrate at least once/year, but possibly more often depending on the degree of bio-fouling in the water.
  • DO sensor —
    — SBE 43 — recalibrate once/year, but possibly less often if used only occasionally and stored correctly (see Application Note 64), and also depending on the amount of fouling and your ability to do some simple validations (see Application Note 64-2)
    — SBE 63 — recalibrate once/year, but possibly less often if used only occasionally and stored correctly and also depending on the amount of fouling and your ability to do some simple validations (see SBE 63 manual)
  • pH sensor — recalibrate every 6 months
  • Transmissometer — usually do not require recalibration for several years. Recalibration at the manufacturer’s factory is the most practical method.

Profiling CTDs:

We often have requests from customers to have some way to know if the CTD is out of calibration. The general character of sensor drift in Sea-Bird conductivity, temperature, and pressure measurements is well known and predictable. However, it is very difficult to know precisely how far a CTD calibration has drifted over time unless you have access to a very sophisticated calibration lab. In our experience, an annual calibration schedule will usually maintain the CTD accuracy to within 0.01 psu in Salinity.

Conductivity drifts as a change in slope as a result of accumulated fouling that coats the inside of the conductivity cell, reducing the area of the cell and causing an under-reporting of conductivity. Fouling consists of both biological growth and accumulated oils and inorganic material (sediment). Approximately 95% of fouling occurs as the cell passes through oil and other contaminants floating on the sea surface. Most conductivity fouling is episodic, as opposed to gradual and steady drift. Most fouling events are small and mostly transitory, but they have a cumulative affect over time. A severe fouling event, such as deployment through an oil spill, could have a dramatic but only partially recoverable effect, causing an immediate jump shift toward lower salinity. As fouling becomes more severe, the fit becomes increasingly non-linear and offsets and slopes no longer produce adequate correction, and return to Sea-Bird for factory calibration is required. Frequently checking conductivity drift is likely to be the most productive data assurance measure you can take. Comparing conductivity from profile to profile (as a routine check) will allow you to detect sudden changes that may indicate a fouling event and the need for cleaning and/or re-calibration.

Temperature generally drifts slowly, at a steady rate and predictably as a simple offset at the rate of about 1-2 millidegrees per year. This is approximately equal to 1-2 parts per million in Salinity error (very small).

Pressure sensor drift is also an offset, and annual comparisons to an accurate barometer to determine offset will generally keep the sensor within specification for several years, particularly as the sensors age over time.

What is an Anti-Foulant Device? Does it affect the conductivity cell calibration? How often should I replace it? Does it require special handling?

The Anti-Foulant Device is an expendable device that is installed on each end of the conductivity cell, so that any water that enters the cell is treated. Anti-Foulant Devices are typically used with moored instruments (SBE 16, 16plus, 16plus-IM, 16plus V2, 16plus-IM V2, 37-SM, 37-SMP, 37-SMP-IDO, 37-SMP-ODO, 37-SI, 37-SIP, 37-SIP-IDO, 37-IM, 37-IMP, 37-IMP-IDO, 37-IMP-ODO), thermosalinographs (SBE 21 and 45), glider CTDs (Glider Payload CTD), moored profilers (SBE 52-MP), and drifters (SBE 41/41CP Argo float CTDs), and optionally with SBE 19plus, 19plus V2, and 49 profilers.

Anti-Foulant Devices have no effect on the calibration, because they do not affect the geometry of the conductivity cell in any way. The Anti-Foulant Devices are mounted at either end of the conductivity cell. For an in-depth explanation of how Sea-Bird makes the conductivity measurement, see Conductivity Sensors for Moored and Autonomous Operation.

Useful deployment life varies, depending on several factors. We recommend that customers consider more frequent anti-foulant replacement when high biological activity and strong current flow (greater dilution of the anti-foulant concentration) are present. Moored instruments in high growth and strong dilution environments have been known to obtain a few months of quality data, while drifters that operate in non-photic, less turbid deep ocean environments may achieve years of quality data. Experience may be the strongest determining factor in specific deployment environments. Sea-Bird recommends that you keep track of how long the devices have been deployed, to allow you to purchase and replace the devices when needed.

Shelf Life and Storage: The best way to store Anti-Foulant Devices is in an air-tight, opaque container. The rate of release of anti-foulant is based on saturation of the environment. The anti-foulant will release until the environment is fully saturated (100% saturated) and then it will no longer release any anti-foulant. So if you keep Anti-Foulant Devices sealed well in an air-tight container, theoretically they will stay good for extended periods of time. Exposure to direct sunlight can also affect the release of anti-foulant; we recommend storage in an opaque container.

Handling:

  • For details, refer to the Material Safety Data Sheet, enclosed with the shipment and available on our MSDS page.
  • Anti-Foulant Devices are not classified by the U.S. DOT or the IATA as hazardous material.

I want to add an auxiliary sensor to my CTD (SBE 9plus, 16, 16plus, 16plus-IM, 16plus V2, 16plus-IM V2, 19, 19plus, 19plus V2, 21, 25, or 25plus). Assuming the auxiliary sensor is compatible with the instrument, what is the procedure?

Adding the sensor(s) is reasonably straightforward:

  1. Mount the sensor; a poor mounting scheme can result in poor data.
    Note: If the new sensor will be part of a pumped system, the existing plumbing must be modified; consult Sea-Bird for details.
  2. Attach the new cable.
  3. (not applicable to 9plus used with 11plus Deck Unit) Using the appropriate terminal program — Enable the channel(s) in the CTD, using the appropriate instrument command.
  4. Using Seasave V7 or SBE Data Processing — Modify the CTD configuration (.con or .xmlcon) file to reflect the new sensor, and type in the calibration coefficients.

What are the recommended practices for storing sensors at low temperatures, and deploying at low temperatures or in frazil or pancake ice?

General

Large numbers of Sea-Bird conductivity instruments have been used in Arctic and Antarctic programs.

Special accommodation to keep temperature, conductivity, oxygen, and optical sensors at or above 0 C is advised. Often, the CTD is brought inside protective doors between casts to achieve this.

Conductivity Cell

When freezing is possible, we recommend that the conductivity sensor be stored dry. Remove larger droplets of water by blowing through the cell. Do not use compressed air, which typically contains oil vapor. Attach a length of Tygon tubing to each end of the conductivity cell to close the cell ends. See Application Note 2D: Instructions for Care and Cleaning of Conductivity Cells for details.

There are several considerations to weigh when contemplating deployments at low temperatures in general, and in frazil or pancake ice:

  • Ensure that the instrument is at or above water temperature before it is deployed. If the cell gets colder than 0 to -2 ºC while on deck, when it enters the water a layer of ice forms inside the cell as the cell warms to ocean temperature. If ice forms inside the conductivity cell, measurements will be low of correct until the ice layer melts and disappears. Thin layers of ice will not hurt the conductivity cell, but repeated ice formation on the electrodes will degrade the conductivity calibration (at levels of 0.001 to 0.020 psu) and thicker layers of ice can lead to glass fracture and permanent damage of the cell.
  • For accurate measurements, keep ice out of the sensing region of the conductivity cell. The conductivity measurement involves determining the electrical resistance of the water inside the sensor. Ice is essentially a non-conductor. To the extent that ice displaces the water, the conductivity will register (very) misleadingly low. Some type of screening is necessary to keep ice out of the cell. This is relatively easy to arrange for the Sea-Bird conductivity cell, which is an electrode-type cell, because its sensing region is totally inside a long tube; plastic mesh could be positioned at each end and would have zero effect on accuracy and stability.

The above considerations apply to all known conductivity sensor types, whether electrode or inductive types. 

If deploying at low temperatures but no surface frazil or pancake ice is present, rinse the conductivity cell in one of the following salty solutions (salty water depresses the freezing point) to prevent freezing during deployment. But this does not mean you can store the cell in one of these solutions outside . . . it will freeze.

  • Solution of 1% Triton in sterile seawater (use 0.5-micron filtered seawater or boiled seawater),   or
  • Brine solution (distilled seawater or homemade salt solution that is higher than 35 psu in salinity).

Note that there is still a risk of forming ice inside the conductivity cell if deploying through frazil or pancake ice on the surface, if the freezing point of the salt water is the same as the water temperature. Therefore, we recommend that you deploy the conductivity cell in a dry state for these deployments.

Commercially available alcohol or glycol antifreezes contain trace amounts of oils that will coat the conductivity cell and the electrodes, causing a calibration shift, and consequently result in errors in the data. Do not use alcohol or glycol in the conductivity cell.

Temperature Sensor

In general, neither the accuracy of the temperature measurement nor the survival of the temperature sensor will be affected by ice.

Oxygen Sensor

For the SBE 43 and SBE 63 Dissolved Oxygen sensor, avoid prolonged exposure to freezing temperature, including during shipment. Do not store the with water (fresh or seawater), Triton solution, alcohol, or glycol in the plenum. The best precaution is to keep the sensor indoors or in some shelter out of the cold weather.

Do I need to remove batteries before shipping my instrument for a deployment or to Sea-Bird?

Alkaline batteries can be shipped installed in the instrument. See Shipping Batteries for information on shipping instruments with Lithium or Nickel-Metal Hydride (NiMH) batteries.

Does it matter if I deploy my moored instrument, which includes a conductivity sensor, in a horizontal or vertical position?

Yes, vertical is usually preferable. In the presence of consistent currents and suspended sediment, we have seen instances where a horizontal conductivity cell is scoured by the abrasive effect of the flow. When scouring is particularly intense, the electrodes can be stripped of their electroplated platinum-black coating, driving the calibration toward fresher readings. Sedimentation (silting) in the cell also drives the readings fresh of correct.

Mounting the instrument vertically avoids abrasive flow and sediment build-up while allowing wave motions and Bernoulli pressures to flush the cell.

Note that some moored sensors (SBE 37-SIP37-SIP-IDO, 37-SMP37-SMP-IDO37-SMP-ODO37-IMP37-IMP-IDO37-IMP-ODO) have a recommended orientation because of their u-shaped plumbing configuration. Refer to the instrument manual for details.

Do I need to clean the exterior of my instrument before shipping it to Sea-Bird for calibration?

Remove as much biological material and/or anti-foul coatings as possible before shipping. Sea-Bird cannot place an instrument with a large amount of biological material or anti-foul coating on the housing in our calibration bath; if we need to clean the exterior before calibration, we will charge you for this service.

  • To remove barnacles, plug the ends of the conductivity cell to prevent the cleaning solution from getting into the cell. Then soak the entire instrument in white vinegar for a few minutes. After scraping off the barnacles and marine growth, rinse the instrument well with fresh water.
  • To remove anti-foul paint, use a Heavy Duty Scotch-Brite pad (http://www.3m.com/us/home_leisure/scotchbrite/products/scrubbing_scouring.html) or similar scrubbing device.

Is it necessary to put my instrument in water to test it? Will I destroy the conductivity cell if I test it in air?

It is not necessary to put the instrument in water to test it. It will not hurt the conductivity cell to be in air.

If there is a pump on the instrument, it should not be run for extended periods in air.

  • Profiling instruments (SBE 9plus, 19, 19plus, 19plus V2, 25, 25plus, 49) and some moored instruments (all pumped MicroCATs with integral dissolved oxygen (DO), and pumped MicroCATs without DO with firmware 3.0 and later) do not turn on the pump unless the conductivity frequency is above a specified minimum value (minimum value is hard-wired in 9plus, user-programmable in other instruments). This prevents the pump from turning on in air. See the instrument manual for details.
  • If your instrument does not check for conductivity frequency before turning on the pump: 
    - For moored SeaCATs (16, 16plus, 16plus-IM, 16plus V2, 16plus-IM V2): Disconnect the pump cable for the test. 
    - For older pumped MicroCATs: orient the MicroCAT to provide an upright U-shape for the plumbing. Then fill the inside of the pump head with water via the pump exhaust tubing; this will provide enough lubrication to prevent pump damage during brief testing.

I want to change the pressure sensor on my CTD, swapping it as needed to get the best data for a given deployment depth. Can I do this myself, or do I need to send the instrument to Sea-Bird?

On most of our instruments, replacement of the pressure sensor should be performed at Sea-Bird. We cannot extend warranty coverage if you replace the pressure sensor yourself.

However, we recognize that you might decide to go ahead and do it yourself because of scheduling/cost issues. Some guidelines follow:

  1. Perform the swap and carefully store the loose sensor on shore in a laboratory or electronics shop environment, not on a ship. The pressure sensor is fairly sensitive to shock, and a loose sensor needs to be stored carefully. Dropping the sensor will break it.
  2. Some soldering and unsoldering is required. Verify that the pressure sensor is mounted properly in your instrument. Properly re-grease and install the o-rings, or the instrument will flood.
  3. Once the sensor is installed, back-fill it with oil. Sea-Bird uses a vacuum-back filling apparatus that makes this job fairly easy. We can provide a drawing showing the general design of the apparatus, which can be modified and constructed by your engineers.
  4. For the most demanding work, calibrate the sensor on a deadweight tester to ensure proper operation and calibration.
  5. Enter the calibration coefficients for the new sensor in:
  • the CTD configuration (.con or .xmlcon) file, using Seasave V7 or SBE Data Processing, and
  • (for an instrument with internally stored calibration coefficients) the CTD EEPROM, using the appropriate terminal program and the appropriate calibration coefficient commands

Note: This discussion does not apply to the SBE 25 (not 25plus), which uses a modular pressure sensor (SBE 29) mounted externally on the CTD. Swap the SBE 29 as desired, use the CC command in Seaterm or SeatermAF to enter the new pressure range and pressure temperature compensation value, and type the calibration coefficients for the new sensor into the CTD configuration (.con or .xmlcon) file in Seasave V7 or SBE Data Processing.

Can I use a pressure sensor above its rated pressure?

Digiquartz pressure sensors are used in the SBE 9plus, 53, and 54. The SBE 16plus V2, 16plus-IM V2, 19plus V2, and 26plus can be equipped with either a Druck pressure sensor or a Digiquartz pressure sensor. All other instruments that include pressure use a Druck pressure sensor.

  • The overpressure rating for a Digiquartz (as stated by Paroscientific) is 1.2 * full scale. The sensor will provide data values above 100% of rated full scale; however, Sea-Bird does not calibrate beyond the rated full scale.
  • The overpressure rating for a Druck (as stated by Druck) is 1.5 * full scale. The sensor will provide data values above 100% of rated full scale; however, Sea-Bird does not calibrate beyond the rated full scale.

Note: If you use the instrument above the rated range, you do so at your own risk; the product will not be covered under warranty.

Can I brush-clean and replatinize the conductivity cell myself? How often should this be done?

Brush-cleaning and replatinizing should be performed at Sea-Bird. We cannot extend warranty coverage if you perform this work yourself.

The brush-cleaning and replatinizing process requires specialized equipment and chemicals, and the disassembly of the sensor. If performed incorrectly, you can damage the cell. Additionally, the sensor must be re-calibrated when the work is complete.

Sea-Bird determines whether brush-cleaning and replatinizing is required based upon how far the calibration has drifted from the original calibration. Typically, a conductivity sensor on a profiling CTD requires brush-cleaning and replatinizing every 5 years.

How do instruments handle external power if internal batteries are installed?

Most Sea-Bird instruments that are designed to be powered internally or externally incorporate diode or'd circuitry, allowing only the voltage that has the greater potential to power the instrument. You can power the instrument externally without running down the internal batteries. This allows you to lab test using external power that has higher voltage than the internal batteries, and then deploy using internal power, knowing that the internal batteries are fresh.

For the SBE 25plus, if external power of 14 volts or higher is applied, the 25plus runs off of the external power, even if the main battery voltage is higher.

How should I handle my CTD to avoid cracking the conductivity cell?

Shipping: Sea-Bird carefully packs the CTD in foam for shipping. If you are shipping the CTD or conductivity sensor, carefully pack the instrument using the original crate and packing materials, or suitable substitutes.

Use: Cracks at the C-Duct end of the conductivity cell are most often caused by:

  • Hitting the bottom, which can cause the T-C Duct to flex, resulting in cracking at the end of the cell.
  • Removing the soaker tube from the T-C duct in a rough manner, which also causes the T-C Duct to flex. Pulling the soaker tube off at an angle can be especially damaging over time to the cell. Pull the soaker tube off straight down and gently.
  • Improper disassembly of the T-C ducted temperature and conductivity sensors (SBE 25, 25plus, and 9plus) when removing them for shipment to Sea-Bird for calibration. See Shipping SBE 9plus, 25, and 25plus Temperature and Conductivity Sensors for the correct procedure.

Note: If a Tygon tube attached to the conductivity cell has dried out, yellowed, or become difficult to remove, slice (with a razor knife or blade) and peel the tube off of the conductivity cell rather than twisting or pulling the tube off.

I sent my conductivity sensor to Sea-Bird for calibration, and you also performed a Cleaning and Replatinizing (C &P). You sent the instrument back with 2 sets of calibration data. What does this mean?

The post-cruise calibration contains important information for drift calculations. The post-cruise calibration is performed on the cell as we received it from you, and is an indicator of how much the sensor has drifted in the field. Information from the post-cruise calibration can be used to adjust your data, based on the sensor’s drift over time. See Application Note 31: Computing Temperature and Conductivity Slope and Offset Correction Coefficients from Laboratory Calibrations and Salinity Bottle Samples.

If the sensor has drifted significantly (based on the data from the post-cruise calibration), Sea-Bird performs a C & P to restore the cell to a state similar to the original calibration. After the C & P, the sensor is calibrated again. This calibration serves as the starting point for future data, and for the sensor’s next drift calculation.

The C & P tends to return the cell to its original state. However, there are many subtle factors that may result in the post-C & P calibration not exactly matching the original calibration. Basically, the old platinizing is stripped off and new platinizing is plated on. Anything in this process that alters the cell slightly will result in a difference from the original calibration. We compare the calibration after C & P with the original calibration, not to make any drift analysis, but to make sure we did not drastically alter the cell, or that the cell was not damaged during the C & P process.

What is the maximum cable length for real-time RS-232 data?

Cable length is one of the most misunderstood items in the RS-232 world. The RS-232 standard was originally developed decades ago for a 19200 baud rate, and defines the maximum cable length as 50 feet, or the cable length equal to a capacitance of 2500 pF. The capacitance rule is often forgotten; using a cable with low capacitance allows you to span longer distances without going beyond the limitations of the standard. Also, the maximum cable length mentioned in the standard is based on 19200 baud rate; if baud is reduced by a factor of 2 or 4, the maximum length increases dramatically. Using typical underwater cables, allowable combinations of cable length and baud rate for Sea-Bird instruments communicating with RS-232 are shown below:

Maximum Cable Length (meters) Maximum Baud Rate*
1600 600
800 1200
400 2400
200 4800
100 9600
50 19,200
25 38,400
16 57,600
8 115,200

*Note: Consult instrument manual for baud rates supported for your instrument.

 

What are the typical data processing steps recommended for each instrument?

Section 3: Typical Data Processing Sequences in the SBE Data Processing manual provides typical data processing sequences for our profiling CTDs, moored CTDs, and thermosalinographs. Typical values for aligning, filtering, etc. are provided in the sections detailing each module of the software. This information is also documented in the software's Help file. To download the software and/or manual, go to SBE Data Processing.

How can I tell if the conductivity cell on my CTD is broken?

Conductivity cells are made of glass, which is breakable.

  • If a cell is cracked, it typically causes a salinity shift or erratic data.
  • However, if the crack occurs at the end of the cell, the sensor will continue to function normally until water penetrates the epoxy jacket. Post-cruise calibration results will reveal whether or not water has penetrated the epoxy jacket.

Inspect the cell thoroughly and make sure that it isn’t cracked or abused in any way.

  • (SBE 9plus, 25, or 25plus) If the readings are good at the surface but erratic at depth, it is likely that the problem is in the cable or the connector, not the conductivity cell. Check the connections, making sure that you burp the connectors when you plug them in (see Application Note 57: Connector Care and Cable Installation). Check the cable itself (swap with a spare cable, if available).
  • If the readings are incorrect at the surface but good after a few meters, it is likely that the problem is flow-related. Verify that the pump is working properly. Check the air bleed valve (the white plastic piece in the Y-fitting, which is installed on vertically deployed CTDs) to see if it is clogged; clean out the small hole with a piece of fine wire supplied with your CTD.
  • If the readings are incorrect for the entire cast, there may be an incorrect calibration coefficient or the cell may be cracked.
  • Check the conductivity calibration coefficients in the configuration (.con or .xmlcon) file.
  • Do a frequency check on the conductivity cell. Disconnect the plumbing on the cell. Rinse the cell with distilled or de-ionized water and blow it dry (use your mouth and not compressed air, as there tends to be oil in the air lines on ships). With the cell completely dry, check the frequency reading. It should read within a few tenths of a Hz of the 0 reading on your Calibration Sheet. If it does not, something is wrong with the cell and it needs to be repaired.

Do you recommend a particular brand of alkaline D-cell batteries?

For Sea-Bird instruments that use alkaline D-cells, Sea-Bird uses Duracell MN 1300, LR20. While rare, we have seen a few problems with cheaper batteries over the years: they are more likely to leak, may vary in size (leading to loose batteries causing a bad power connection), and may not last as long.

I want to integrate a moored CTD with some auxiliary sensors (transmissometer, fluorometer, etc.). Which CTD should I use?

Sea-Bird currently manufactures only 1 moored CTD that can accept auxiliary sensors, the SBE 16plus V2 SeaCAT (and its inductive modem version, the 16plus-IM V2). These instruments measure conductivity and temperature; a pressure sensor is optional. They have 6 differential A/D channels and 1 RS-232 channel available for auxiliary sensors, which can be plugged into the CTD end cap.

The SBE 37 MicroCAT family includes CTDs that are integrated with a dissolved oxygen sensor at the factory.

Notes:

  • The SBE 19plus V2 SeaCAT, intended primarily for profiling applications, can also be used in moored mode. The 19plus V2 also has 6 differential A/D channels and 1 RS-232 channel available for auxiliary sensors. When in moored mode, it functions similar to a 16plus V2 with optional pressure sensor.
  • The older versions of these products, the SBE 16 / 16plus / 16plus-IM and SBE 19 / 19plus, also accept auxiliary sensors.

See Product Selection Guide for a table summarizing the features of all our moored instruments.

What are the major steps involved in deploying a moored instrument?

Application Note 83: Deployment of Moored Instruments contains a checklist, which is intended as a guideline to assist you in developing a checklist specific to your operation and instrument setup.

How should I pick the pressure sensor range for my CTD? Would the highest range give me the most flexibility in using the CTD?

While the highest range does give you the most flexibility in using the CTD, it is at the expense of accuracy and resolution. It is advantageous to use the lowest range pressure sensor compatible with your intended maximum operating depth, because accuracy and resolution are proportional to the pressure sensor's full scale range. For example, the SBE 9plus pressure sensor has initial accuracy of 0.015% of full scale, and resolution of 0.001% of full scale. Comparing a 2000 psia (1400 meter) and 6000 psia (4200 meter) pressure sensor:

  • 1400 meter pressure sensor ‑ initial accuracy is 0.21 meters and resolution is 0.014 meters
  • 4200 meter pressure sensor ‑ initial accuracy is 0.63 meters and resolution is 0.042 meters

Family Model . Housing Pressure Sensor/Range Connectors Communications
16 P . 1 – 600 m (plastic) 0 – none 1 – XSG/AG 0 – RS-232
      2 – 7000 m (titanium) 1 – 20 m strain gauge 2 – MCBH  
      3 – 10,500 m (titanium) 2 – 100 m strain gauge    
        3 – 350 m strain gauge    
        4 – 600 m strain gauge    
        5 – 1000 m strain gauge    
        6 – 2000 m strain gauge    
        7 – 3500 m strain gauge    
        8 – 7000 m strain gauge    
        A – 45 psia Digiquartz    
        B – 100 psia Digiquartz    
        C – 200 psia Digiquartz    
        D – 300 psia Digiquartz    
        E – 400 psia Digiquartz    
        F – 1000 psia Digiquartz    
        G – 2000 psia Digiquartz    
        H – 3000 psia Digiquartz    
        I – 6000 psia Digiquartz    
        J – 10,000 psia Digiquartz    
        K – 15,000 psia Digiquartz    

Example: 16P.2820 is an SBE 16plus V2 with 7000 m housing, 7000 m strain gauge pressure sensor, MCBH connectors, and RS-232 communications. See table below for description of each selection:

PART # DESCRIPTION NOTES
16plus V2

SeaCATplus Version 2 Conductivity & Temperature (pressure optional) Recorder - Includes 64 MB memory, serial interface, 6 differential A/D channels (0 - 5 volt input range), 1 RS-232 data input channel, AF24173 Anti-Foulant Devices, data I/O extension cable, data I/O cable, Seasoft software, & complete documentation.

SBE 16plus V2 is a CTD intended for moored applications.
SBE 16plus V2 Housing (depth) Selections MUST SELECT ONE
16P.1xx0 600 m plastic housing  
16P.2xx0 7000 m titanium housing  
16P.3xx0 10,500 m titanium housing  
SBE 16plus V2 Pressure Sensor Selections MUST SELECT ONE
16P.x0x0 No pressure sensor Pressure sensor is installed in connector end cap, & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using 16plus V2, it is at expense of accuracy & resolution. It is advantageous to use lowest range pressure sensor compatible with your intended maximum operating depth, because accuracy & resolution are proportional to pressure sensor's full scale range. For example, comparing 2000 & 7000 m sensors:
  • 2000 m sensor:
    initial accuracy = 2 m (= 0.1% * 2000 m),
    resolution = 0.04 m (= 0.002% * 2000 m)
  • 7000 m sensor:
    initial accuracy = 7 m (= 0.1% * 7000 m),
    resolution = 0.14 m (= 0.002% * 7000 m)
16P.x1x0 20 m strain gauge pressure sensor
16P.x2x0 100 m strain gauge pressure sensor
16P.x3x0 350 m strain gauge pressure sensor
16P.x4x0 600 m strain gauge pressure sensor
16P.x5x0 1000 m strain gauge pressure sensor
16P.x6x0 2000 m strain gauge pressure sensor
16P.x7x0 3500 m strain gauge pressure sensor
16P.x8x0 7000 m strain gauge pressure sensor
16P.xAx0 45 psia (20 m) Digiquartz pressure sensor with temperature compensation Digiquartz pressure sensors provide better accuracy (0.02% of full scale range vs 0.1% of full scale range) & resolution (Digiquartz resolution dependent on user-programmable integration time) than strain gauge pressure sensors. See strain gauge options above for photo of pressure sensor port; when used with Digiquartz, nylon pressure capillary fitting screws into port.

Pressure sensor is installed in connector end cap, & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using 16plus V2, it is at expense of accuracy & resolution. It is advantageous to use lowest range pressure sensor compatible with your intended maximum operating depth, because accuracy & resolution are proportional to pressure sensor's full scale range. For example, comparing 2000 psia (1400 m) & 6000 psia (4200 m) sensors:

  • 2000 psia (1400 m) sensor:
    initial accuracy = 0.28 m (= 0.02% * 1400 m)
  • 6000 psia (4200 m) sensor:
    initial accuracy = 0.84 m (= 0.02% * 4200 m)
16P.xBx0 100 psia (60 m) Digiquartz pressure sensor with temperature compensation
16P.xCx0 200 psia (130 m) Digiquartz pressure sensor with temperature compensation
16P.xDx0 300 psia (200 m) Digiquartz pressure sensor with temperature compensation
16P.xEx0 400 psia (270 m) Digiquartz pressure sensor with temperature compensation
16P.xFx0 1000 psia (680 m) Digiquartz pressure sensor with temperature compensation
16P.xGx0 2000 psia (1,400 m) Digiquartz pressure sensor with temperature compensation
16P.xHx0 3000 psia (2,000 m) Digiquartz pressure sensor with temperature compensation
16P.xIx0 6000 psia (4,200 m) Digiquartz pressure sensor with temperature compensation
16P.xJx0 10,000 psia (6,800 m) Digiquartz pressure sensor with temperature compensation
16P.xKx0 15,000 psia (10,500 m) Digiquartz pressure sensor with temperature compensation
SBE 16plus V2 Connector Selections MUST SELECT ONE
16P.xx10 XSG/AG connectors on SeaCAT bulkhead connectors and on extender and data I/O cables

Wet-pluggable connectors may be mated in wet conditions. Their pins do not need to be dried before mating. By design, water on connector pins is forced out as connector is mated. However, they must not be mated or un-mated while submerged. Wet-pluggable connectors have a non-conducting guide pin to assist pin alignment & require less force to mate, making them easier to mate reliably under dark or cold conditions, compared to XSG/AG connectors. Like XSG/AG connectors, wet-pluggables need proper lubrication & require care during use to avoid trapping water in sockets.

 
These selections include extender & data I/O cable compatible with data I/O - pump bulkhead connector.

16P.xx20 Wet-pluggable (MCBH) connectors on SeaCAT bulkhead connectors and on extender and data I/O cables
SBE 16plus V2 Submersible Pump Options
16p-4e Add SBE 5M plastic pump for sensor flushing, XSG/RMG connectors (includes data I/O & pump Y-cable 17797, & mount) SBE 5M pump is intended for providing pumped conductivity only. Pump provides better conductivity response & anti-foulant protection than non-pumped configuration. SBE 5M pump is rated to 600 m with plastic housing or 10,500 m with titanium housing.

Larger, more powerful SBE 5P or 5T is required if also planning to pump auxiliary sensors (such as dissolved oxygen, etc.). SBE 5P plastic pump is rated to 600 m; SBE 5T titanium pump is rated to 10,500 m. Operational characteristics of SBE 5P & 5T are identical.

Data I/O - Pump bulkhead connector on 16plus V2 is standard, so pump can be added in field without requiring any modifications to 16plus V2. These all include pump, pump mount, & data I/O - pump Y-cable. 16p-4c, -4d, -4g, & -4h include Y-cable compatible with wet-pluggable bulkhead connectors on 16plus V2 & on pump. See DN 31551 for XSG/AG connectors, DN 32896 for wet-pluggable connectors.

16p-4a Add SBE 5M titanium pump for sensor flushing, XSG/RMG connectors (includes data I/O & pump Y-cable 17797, & mount)
16p-4f Add SBE 5P plastic pump for sensor flushing, XSG/RMG connectors (includes data I/O & pump Y-cable 17797, & mount)
16p-4b Add SBE 5T titanium pump for sensor flushing, XSG/RMG connectors (includes data I/O & pump Y-cable 17797, & mount)
16p-4g Add SBE 5M plastic pump for sensor flushing, Wet-pluggable MCBH connectors (includes data I/O & pump Y-cable 172220, & mount. Requires 16P.xx20)
16p-4c Add SBE 5M titanium pump for sensor flushing, Wet-pluggable MCBH connectors (includes data I/O & pump Y-cable 172220, & mount. Requires 16P.xx20)
16p-4h Add SBE 5P plastic pump for sensor flushing, Wet-pluggable MCBH connectors (includes data I/O & pump Y-cable 172220, & mount. Requires 16P.xx20)
16p-4d Add SBE 5T titanium pump for sensor flushing, Wet-pluggable MCBH connectors (includes data I/O & pump Y-cable 172220, & mount. Requires 16P.xx20)
SBE 16plus V2 Dissolved Oxygen Sensor Options
16p-7g SBE 63 Optical Dissolved Oxygen Sensor, with XSG connector, 600 m (cable & mount included, requires 16p-4f or -4b & 16P.xx10) SBE 63 is available in 7000 m titanium (16p-7e or -7f) or 600 m (16p-7g or -7h) housing, and its connector type (XSG or wet-pluggable) must match 16plus V2 connector type.

SBE 63 is plumbed in line between conductivity sensor & pump; consequently, system requires more powerful SBE 5P plastic pump (16p-4f or -4h) or SBE 5T titanium pump (16p-4b or -4d) instead of SBE 5M pump (16p-4a, -4c, -4e, or -4g). Operational characteristics of SBE 5P & 5T are identical.

16p-7e through h includes SBE 63, mount, & straight cable to connect sensor to 16plus V2 bulkhead connector. If connecting 2 sensors to 1 bulkhead connector, extra charge to substitute Y-cable applies in addition to 16p-7_ price.

Additional sensors not listed here — fluorometers, transmissometers, turbidity meters, PAR sensors, etc. from third party manufacturers — are compatible with 16plus V2. These sensors can be purchased from Sea-Bird & integrated with 16plus V2 at our factory, or you can purchase mount kits & cables from Sea-Bird & perform integration yourself. See Third Party portion of price list.
16p-7h SBE 63 Optical Dissolved Oxygen Sensor with Wet-pluggable connector, 600 m (cable & mount included, requires 16p-4h or -4d & 16P.xx20)
16p-7e SBE 63 Optical Dissolved Oxygen Sensor with XSG connector, 7000 m (cable & mount included, requires 16p-4b & 16P.xx10)
16p-7f SBE 63 Optical Dissolved Oxygen Sensor with Wet-pluggable connector, 7000 m (cable & mount included, requires 16p-4d & 16P.xx20)
SBE 16plus V2 Spares & Accessories
801542 AF24173 Anti-Foulant Device pair (spare, bagged, labeled for shipping) Anti-foulant devices fit into anti-foulant device cups at each end of conductivity cell. Anti-foulant devices included with standard shipment; these are spares.
Useful life varies, depending on several factors. We recommend that customers consider more frequent replacement when high biological activity & strong current flow (greater dilution of anti-foulant concentration) are present. Moored instruments in high growth & strong dilution environments have been known to obtain a few months of quality data, while drifters that operate in non-photic, less turbid deep ocean environments may achieve years of quality data. Experience may be strongest determining factor in specific deployment environments.
233540 Anti-foulant cap without hose barb, black Cap without hose barb is used for:
  • Intake end of conductivity cell
  • Exhaust end of conductivity cell, when 16plus V2 is not pumped
233538 Anti-Foulant cap with hose barb, black Barbed cap is used for:
  • Exhaust end of conductivity cell when 16plus V2 is pumped, for connection of Tygon tubing
  • Intake end of conductivity cell during cleaning and storage only, to allow you to connect Tygon tubing for flushing plumbing
80291 9-cell series alkaline battery pack (solder connected) Batteries are easily accessed by unscrewing battery end cap. 16plus V2 comes standard with 9 D cell alkaline batteries (nominal 14 Ah), but can be powered with Electrochem lithium batteries for more power intensive / longer deployments.

Notes:

  • Sea-Bird does not supply Electrochem lithium batteries; you must purchase them elsewhere (see WGT's website for purchasing information). Shipping restrictions apply for Electrochem lithium batteries & assembled battery packs.
  • Lithium battery packs cannot be used with a 16plus V2 that is integrated with SBE 5T or 5P pump, because of current limitations. They can be used with a 16plus V2 with no pump, or with an SBE 5M pump.
801483 Battery pack assembly kit for 80547 9 D 10.8v/42Ah Lithium pack with instructions, cells not included (DN 67143)
801479 Battery pack assembly kit for 80540 3 DD 10.8v/30Ah Lithium pack with instructions, cells not included (DN 67144)
50434 SBE 16plusV2/19plusV2 Spares Kit (XSG/AG connectors) - Complete support kit containing spare data I/O cable, bulkhead connectors, dummy plugs, Triton X-100, o-ring lubricant, & other mechanical spares & maintenance items. Order appropriate spares kit for connector type on 16plus V2:
  • 50434 for 16plus V2 with XSG/AG connectors — See document 67196 for complete listing of parts.
  • 50435 for 16plus V2 with wet-pluggable connectors — See document 67197 for complete listing of parts.
50435 SBE 16plusV2/19plusV2 Spares Kit (Wet-pluggable connectors) - Complete support kit containing spare data I/O cable, bulkhead connectors, dummy plugs, Triton X-100, o-ring lubricant, & other mechanical spares & maintenance items.
801225 Data I/O Cable, RMG-4FS with DB-9S, 2.4 m (DN 32421) These test cables are used for setting up system & uploading data from memory after recovery. Data I/O cable connects to one of following cables:
  • 4-pin end of pump-data I/O Y-cable (for 16plus V2 used with a pump), or
  • 4-pin end of data I/O extension cable (for 16plus V2 used without a pump)
Connector type (RMG or wet-pluggable) must match 16plus V2 connector type. Applicable cable is included with 16plus V2; these are spares.
801374 Data I/O cable, Wet-pluggable (MCIL-4FS) with DB-9S, 2.4 m (DN 32715)
17762 Data I/O extension cable, AG-206 to RMG-4MP, 0.8 m (DN 31605) This cable connects 6-pin data I/O pump bulkhead connector to 801225 data I/O cable, for 16plus V2 used without a pump.
177797 Y-cable, Pump-Data I/O, RMG/AG connectors (DN 31551) These Y-cables connect 6-pin data I/O - pump bulkhead connector to pump (2-pin leg) & to data I/O cable (4-pin leg).
172220 Y-cable, Pump-Data I/O, Wet-pluggable (DN 32896)
90087 Universal plumbing kit (includes pump air release valve, Y-fitting, & tubing) - Application Note 64-1 Application Note 64-1 details installation of plumbing for SBE 43 & pump on a CTD.
50087.1 Cell filler/storage device with hose barbs (Application Note 34) For cleaning conductivity cell after each use & storing instrument between uses. See document 67043 & Application Note 2D: Instructions for Care and Cleaning of Conductivity Cells.
20200 USB to Serial Port Adapter, FTDI UC232R-10 (connects computers with USB ports to RS-232 instruments) Many newer PCs & laptop computers have USB port(s) instead of RS-232 serial port(s). USB serial adapter plugs into USB port, & allows a serial device to be connected through adapter. Multi-port adapters are available from other companies; see Application Note 68.
various Plumbing For assorted sizes of Tygon tubing, see SBE 5M or 5P or 5T Configuration.

 

Cables

  • 801225 To computer COM port (from XSG connector), 2.4 m, DN 32421
    Note: 801225 connects to either data I/O extension cable 17762 (when 16plus V2 configured without a pump) or to 4-pin end of Y-cable 17797 (when 16plus V2 configured with a pump).
  • 801374 To computer COM port (from Wet-pluggable connector), 2.4 m, DN 32715
    Note: 801374 connects to either data I/O extension cable 172393 (when 16plus V2 configured without a pump) or to 4-pin end of Y-cable 172220 (when 16plus V2 configured with a pump).
  • 17762 Data I/O extension cable (RMG/AG connectors), 6-pin to 4-pin, 0.84 m, DN 31605
  • 172393 Data I/O extension cable (Wet-pluggable connectors), 6-pin to 4-pin, 0.84 m, DN 33329
  • 17797 To SBE 5M, 5T, or 5P (Y-cable to pump and data I/O, RMG/AG connectors), DN 31551
  • 172220 To SBE 5M, 5T, or 5P (Y-cable to pump and data I/O, Wet-pluggable connectors), DN 32896
  • 172447 To SBE 43 (RMG/AG connectors), 1.1 m, DN 32496
  • 172448 To SBE 43 (Wet-pluggable connectors), 1.1 m, DN 32654
  • 17088 To SBE 63 (RMG connectors), 1.1 m, DN 30567
  • 171792 To SBE 63 (Wet-pluggable connectors), 1.1 m, DN 32810
  • 17610 To Biospherical QSP-200L or QSP-2300L (from AG connector), 2 m, DN 30701
  • 17602 To Chelsea AquaTracka or AlphaTracka (from AG connector), 1.2 m, DN 31253
  • 17361 To D&A OBS-3 (from AG connector), 0.76 m, DN 30954
  • 172130 To D&A OBS-3+ (from AG connector), High & Low range, 1 m, DN 33080
  • 172131 To D&A OBS-3+ (from Wet-pluggable connector), High & Low range, 1 m, DN 33081
  • 172109 To D&A OBS-3+ (from AG connector), Low range (1X), 1 m, DN 33058
  • 172111 To D&A OBS-3+ (from Wet-pluggable connector), Low range (1X), 1 m, DN 33060
  • 172110 To D&A OBS-3+ (from AG connector), High range (4X), 1 m, DN 33059
  • 172112 To D&A OBS-3+ (from Wet-pluggable connector), High range (4X), 1 m, DN 33061
  • 171099 To Seapoint fluorometer or turbidity meter (1X) (from G connector), 1.1 m, DN 32073
  • 171147 To Seapoint fluorometer or turbidity meter (3X/5X) (from AG connector), 1.1 m, DN 32101
  • 172221 To Seapoint fluorometer or turbidity meter (10X/20X) (from AG connector), 1.1 m, DN 31933
  • 171845 To Seapoint fluorometer or turbidity meter (30X/100X) (from AG connector), 1.1 m, DN 31924
  • 171908 To Turner Cyclops-7 (1X) (from AG connector), 1.1 m, DN 32910
  • 171907 To Turner Cyclops-7 (10X) (from AG connector), 1.1 m), DN 32909
  • 171909 To Turner Cyclops-7 (100X) (from AG connector), 1.1 m, DN 32911
  • 171418 To Turner SCUFA (from AG connector), 1.1 m, DN 32417
  • 17876 To WET Labs C-Star or WETStar with old-style 4-pin connector (from AG connector), 1.1 m, DN 31725
  • 171953 To WET Labs ECO-AFL, ECO-FL, C-Star, or WETStar with new-style 6-pin connector (from AG connector), 1.1 m, DN 32491
  • 172437 To WET Labs ECO-AFL, ECO-FL, C-Star, or WETStar with new-style 6-pin connector (from Wet-pluggable connector), 1.1 m, DN 32853
  • 171869 To WET Labs ECO-FL-NTUS or ECO-FL-NTU(RT) (from AG connector), 1.1 m, DN 32812
  • 172285 To WET Labs ECO-FL-NTUS or ECO-FL-NTU(RT) (from Wet-pluggable connector), 1.1 m, DN 32846
  • 172880 To WET Labs Triplet or Triplet-W (from AG connector), 1.1 m, DN 33673
  • 172815 To WET Labs Triplet or Triplet-W (from Wet-pluggable connector), 1.1 m, DN 33622

Mount Kits

SeaCATplus Cage

  • 801269 SBE 16plus/16plus V2/19plus/19plus V2 to PN 801269 Cage (document 67171 and drawing 22009)
  • 801270 SBE 16plus/16plus V2/19plus/19plus V2 to PN 801270 Tall Cage; required for SBE 16plus/16plus V2/19plus/19plus V2 with Quartz pressure sensor (document 67171 and drawing 22010)

Spare Parts

Batteries

  • 801483  9D (10.8 V / 42 AH) lithium battery pack kit (document 67143) — see notes below.
  • 801479  3DD (10.8 V / 30 AH) lithium battery pack kit (document 67144) — see notes below.

Notes: 
1. Batteries not included.
2. Lithium battery packs cannot be used with a 16plus, 16plus-IM, 16plus V2, or 16plus-IM V2 that is integrated with SBE 5T or 5P pump, because of current limitations. They can be used with an instrument with no pump, or with an SBE 5M pump.

Hardware, O-ring, & Mounting Kits

  • 60021 Battery end cap hardware & O-ring kit for SBE 16/16plus/16plus-IM/16plus V2/16plus-IM V2, 17plus, 19/19plus/19plus V2, 25, 26/26plus, 53, 54, 55, or AFM (document 67042)
  • 50274 O-ring kit for SBE 16plus, 16plus-IM, 16plus V2, 16plus-IM V2, 19plus, or 19plus V2 (document 67102)
  • 50273 Hardware kit for SBE 16plus, 16plus-IM, 16plus V2, 16plus-IM V2, 19plus, or 19plus V2 (document 67103)
  • 90087 CTD plumbing kit (document 67108)
  • 50434 Seaspares kit for SBE 16plus V2 or 19plus V2 with XSG/AG connectors (hardware, O-rings, magnetic switch, cable, dummy plugs, connectors, etc.) (document 67196)
  • 50435 Seaspares kit for SBE 16plus V2 or 19plus V2 with wet-pluggable connectors (hardware, O-rings, magnetic switch, cable, dummy plugs, connectors, etc.) (document 67197)

Miscellaneous

  • 801542 AF24173 Anti-Foulant Device (pair, bagged, labeled for shipping)
  • 233186 High-head pressure port plug for muddy/biologically productive environments (for instrument with Druck pressure sensor) (Application Note 84)

Compare  Moored / Time Series Recording Instruments

SBE Measures
(C, T, P)
Auxiliary Sensors Memory Power Communication Real-Time
Data
Comments
Internal External
SBE 16plus V2 SeaCAT C-T (P) Recorder C, T, P* 6 A/D; 1 RS-232 64 Mb RS-232 Optional pump
SBE 16plus SeaCAT C-T (P) Recorder
C, T, P* 4 A/D; optional RS-232 or PAR 8 Mb RS-232 or -485 Replaced by SBE 16plus V2 in 2008
SBE 16 SeaCAT C-T (P) Recorder
C, T, P* 4 A/D 1 Mb RS-232 Replaced by 16plus in 2001
SBE 16plus-IM V2 SeaCAT C-T (P) Recorder C, T, P* 6 A/D; 1 RS-232 64 Mb   Inductive Modem Optional pump
SBE 16plus-IM SeaCAT C-T (P) Recorder
C, T, P* 4 A/D; optional RS-232 or PAR 8 Mb   Inductive Modem Replaced by SBE 16plus-IM V2 in 2008
SBE 19plus V2 SeaCAT Profiler CTD C, T, P 6 A/D; 
1 RS-232
64 Mb RS-232 Programmable mode — profiling or moored
SBE 19plus SeaCAT Profiler CTD
C, T, P 4 A/D; optional PAR 8 Mb RS-232 Replaced by SBE 19plus V2 in 2008
SBE 19 SeaCAT Profiler CTD
C, T, P 4 A/D 1 - 8 Mb RS-232 Replaced by 19plus in 2001
SBE 37-SM MicroCAT C-T (P) Recorder C, T, P*   8 Mb RS-232 or -485  
SBE 37-SMP MicroCAT C-T (P) Recorder C, T, P*   8 Mb RS-232, RS-485, or SDI-12 Integral pump

SBE 37-SMP-IDO MicroCAT C-T-DO (P) Recorder

C, T, P* Integrated DO 8 Mb RS-232 or -485 Integral pump
SBE 37-SMP-ODO MicroCAT C-T-DO (P) Recorder C, T, P* Integrated Optical DO 8 Mb RS-232, RS-485, or SDI-12 Integral pump
SBE 37-IM MicroCAT C-T (P) Recorder C, T, P*   8 Mb   Inductive modem  
SBE 37-IMP MicroCAT C-T (P) Recorder C, T, P*   8 Mb   Inductive modem Integral pump
SBE 37-IMP-IDO MicroCAT C-T-DO (P) Recorder C, T, P* Integrated DO 8 Mb   Inductive modem Integral pump
SBE 37-IMP-ODO MicroCAT C-T-DO (P) Recorder C, T, P* Integrated Optical DO 8 Mb   Inductive modem Integral pump
SBE 37-SI MicroCAT C-T (P) Recorder C, T, P*   8 Mb   RS-232 or -485  
SBE 37-SIP MicroCAT C-T (P) Recorder C, T, P*   8 Mb   RS-232 or -485 Integral pump

SBE 37-SIP-IDO MicroCAT C-T-DO (P) Sensor

C, T, P* Integrated DO 8 Mb   RS-232 or -485 Integral pump
Water Quality Monitor (WQM) C, T, P Integrated DO, chlorophyll fluorescence, turbidity (WQMx adds CDOM fluorescence, replaces turbidity with backscattering)   RS-232 Jointly developed by Sea-Bird Electronics and WET Labs; manufactured by WET Labs
SBE 39plus Temperature (P) Recorder T, P*   64 Mb Optional USB & RS-232 Optional  
SBE 39 Temperature (P) Recorder
T, P*   32 Mb Optional RS-232 Optional Replaced by SBE 39plus in 2014
SBE 39-IM Temperature (P) Recorder T, P*   32 Mb   Inductive modem  
SBE 56 Temperature Logger T   64 Mb   USB    
SBE 26plus Seagauge Wave & Tide Recorder T, P C optional 32 Mb RS-232
(tides, waves, & wave statistics)
Wave & tide recorder
SBE 26 Seagauge Wave & Tide Recorder
T, P C optional 8 Mb RS-232   Replaced by SBE 26plus in 2004
SBE 53 BPR Bottom Pressure Recorder T, P C optional 32 Mb RS-232 Bottom pressure recorder
SBE 54 Tsunameter Tsunami Pressure Sensor T, P   128 Mb Optional RS-232 Tsunami pressure sensor

C = conductivity, T = temperature, P = pressure, DO = dissolved oxygen
* = optional
products are no longer in production. Follow the links above to the product page to retrieve manuals and application notes for these older products.