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Water Quality Monitor (WQM)

The Water Quality Monitor (WQM) is designed to deliver core biogeochemical water quality parameters in coastal ecosystems from a single integrated package.

Accurate data, unattended

Sea-Bird brings offshore research-grade measurement technology to inshore and estuarine research through ocean observing applications. The WQM incorporates Sea-Bird Scientific's fluorometer-turbidity and CTD sensors, providing temperature, salinity, depth, dissolved oxygen, chlorophyll fluorescence, turbidity and backscattering data.

The WQM sensors have the accuracy and precision to track subtle long-term changes in even the cleanest marine systems. By combining multiple active and passive anti-fouling features, the WQM assures this data quality in coastal and inshore regimes. Extensive field trials have demonstrated the WQM's unprecedented long-term stability in biologically rich coastal waters.

Built for extended deployment 

Typically, biofouling and sediment loads are the dominant factors that degrade and limit the data quality. These factors can overwhelm inadequately protected sensors and invalidate their data—often in just a few days. Effective long term monitoring demands the highest data quality over weeks and months. The key to cost effective data collection requires a sensor package that can withstand the environmental hazards of coastal waters. The WQM employs active flow control, passive flow prevention, light-blocking, active biocide injection and passive inhibitors to effectively and safely combat internal and external fouling. With fouling minimized, the superior inherent stability of the WQM sensors translates directly to superior long-term data quality.

Cost effective—now and later

The cost of monitoring is tied to the instrument life cycle and real value is ultimately provided through quality data, day after day, month after month, year after year. The WQM provides quality data while dramatically reducing the need for field and factory service. The bottom line: the WQM delivers unequaled long-term data quality and minimizes operational and maintenance costs.

Anti-Fouling Features

  • Pump-controlled flow
  • Extensive copper cladding
  • BLeach Injection System (BLIS) protects DO sensor and CTD flow path
  • Anti-Foulant (AF) collar for conductivity cell (EPA approved)
  • Light-blocked sample chambers
  • Bio-wiper protects optical components 

 

WQM on LOBO (Land/Ocean Biogeochemical Observatory)

Live data:

Historical data:

CONDUCTIVITY

Range 0-9 S/m
Accuracy 0.003 mS/cm
Resolution 0.00005 S/m

 

PRESSURE

Range 0-100 or -200 m
Accuracy  0.1% Full Scale
Resolution 0.002% Full Scale

 

FLUORESCENCE

Rangec  0-50 µg/I
Accuracyd 0.2% FS µg/I

Precision

0.04% FS µg/I

0.02% FS/deg C

Wavelength EX/EM 470/695 nm

ELECTRICAL

Connector MCBH-6-MP, MCBH-4-FS
Output RS-232
Input 9-16 VDC

Sample rate

1 Hz
Current draw 

<100 mA Sampling

350 mA Peak

< 50 µA Sleep

TEMPERATURE

Rangea  -5-35 deg C
Accuracyb 0.002 deg C
Resolution 0.001 deg C

 

DISSOLVED OXYGEN

Range 120% of saturation (150% upon request)
Accuracy 2% of saturation
Resolution 0.035% of saturation (0.003 ml/l at 0 C, 35 PSU)

 

TURBIDITY

Range 0-25 NTU
Accuracy 0.1% FS NTU
Precision

0.04% FS NTU

Wavelength 700 nm

 

MECHANICAL

Depth 200 m
Pressure housing Acetal copolymer, ABS, PVC, titanium, copper
Dimensions 65.4 cm long x 18.5 cm max OD
Weight in air 5.4 kg
Weight in water 1.8 kg

a. Oxygen range is relative to surface saturation.

b. +/- 0.2 mg/l or 2% of reading, whichever is greater.
 
c. Available measurement ranges:
  • 0–30 μg Chl/l, 0–10 NTU
  • 0–50 μg Chl/l, 0–25 NTU
  • 0–50 μg Chl/l, 0–100 NTU
  • 0–75 μg Chl/l, 0–200 NTU
  • 0–125 μg Chl/l, 0–350 NTU
  • 0–250 μg Chl/l, 0–1000 NTU
d. Chlorophyll fluorescence is created by living organisms and is subject to taxonomical and physiological changes. Field calibration is highly recommended. See user’s guide for standard protocols.
 
e. Depth rating is the lesser of 200 m or the pressure sensor rating.
 
The list below includes (as applicable) the current product brochure, manual, and quick guide; software manual(s); and application notes.

Title Type Publication Date PDF File
AN104 Disable BLIS operation on WQM Application Notes Thursday, June 29, 2017 AN103 Disable BLIS operation on WQM.pdf
AN115 WQM Testing and Troubleshooting Commands Application Notes Tuesday, July 4, 2017 AN115 WQM Testing and Troubleshooting Commands.pdf
WQM Datasheet Product Datasheet Tuesday, July 4, 2017 datasheet-wqm.pdf
WQMx Datasheet Product Datasheet Tuesday, July 4, 2017 datasheet-wqmx.pdf
WQM Drawing Product Drawing Tuesday, July 4, 2017 drawing-WQM.pdf
WQMX Drawing Product Drawing Tuesday, July 4, 2017 drawing-WQMX.pdf
WQM/WQMx Manual Product Manual Tuesday, July 4, 2017 manual-WQMandX.pdf
Version released July 5, 2017

The following issues have been corrected in WQM Host v1.59:

1.      File erasing functions have been restored, including the selection and erasure of multiple files with a single erase button press.

s2.      Status records and data are now correctly displayed in the Scroll Data and Troubleshooting tabs when run on Windows 8 computers.

3.      Files with invalid voltage measurements can be process in the Advanced File Processing window.

WQMHostv159a.exe for Windows 7/8/10


What are the sensor check procedures for Water Quality Monitoring?

How do I save and retrieve data from my WQM?

How do I set up my WQM for deployment?

How do I test my meter's functionality?

What is the input voltage range for my instrument?

Compare Water Samplers and CTD Configurations

Water Sampler Number of Bottles Bottle Size (liters) CTD Control Deployment Depth
Real-Time
Configuration
Self-Contained Configuration 
(auto bottle firing)
SBE 32 Carousel Water Sampler
(full size)
12 1.7 - 30 SBE 9plus SBE 11plus V2 Deck Unit SBE 17plus V2 Searam Recorder & Auto Fire Module

6800 m (aluminum), 7000 m (titanium)

24 1.7 - 12
36 Consult Factory
12 1.7 - 30

SBE 19 SeaCAT**
SBE 19plus SeaCAT**
SBE 19plus V2 SeaCAT
SBE 25 Sealogger**
SBE 25plus Sealogger

SBE 33 Carousel Deck Unit
(can also be used with SBE 49 FastCAT CTD Sensor)
Carousel Auto Fire Module (AFM)
(can also be used with SBE 50 Digital Oceanographic Pressure Sensor)
24 1.7 - 12
36 Consult Factory
SBE 32C Carousel Water Sampler
(compact)
12 1.7 - 8 SBE 9plus SBE 11plus V2 Deck Unit SBE 17plus V2 Searam Recorder & Auto Fire Module

6800 m (aluminum), 7000 m (titanium)

SBE 19 SeaCAT**
SBE 19plus SeaCAT**
SBE 19plus V2 SeaCAT
SBE 25 Sealogger**
SBE 25plus Sealogger

SBE 33 Carousel Deck Unit
(can also be used with SBE 49 FastCAT CTD Sensor)
Carousel Auto Fire Module (AFM)
(can also be used with SBE 50 Digital Oceanographic Pressure Sensor)
SBE 32SC Carousel Water Sampler
(sub-compact)
12 1.7 or 2.5

SBE 19 SeaCAT**
SBE 19plus SeaCAT**
SBE 19plus V2 SeaCAT
SBE 25 Sealogger**
SBE 25plus Sealogger

SBE 33 Carousel Deck Unit
(can also be used with SBE 49 FastCAT CTD Sensor)
Carousel Auto Fire Module (AFM)
(can also be used with SBE 50 Digital Oceanographic Pressure Sensor)

6800 m (aluminum), 7000 m (titanium)

SBE 55 ECO Water Sampler 3 or 6 4

SBE 19 SeaCAT**
SBE 19plus SeaCAT**
SBE 19plus V2 SeaCAT
SBE 25 Sealogger**
SBE 25plus Sealogger

SBE 33 Carousel Deck Unit
(can also be used with SBE 49 FastCAT CTD Sensor)

Built-in auto bottle firing, no additional equipment required 600 m

Notes:
1. Operation of all SBE 32 Carousel Water Sampler models with the SBE 33 Deck Unit requires serial interface in the Carousel.
2. See Application Note 45: Guide to SBE 32 Carousel Water Sampler Configuration Options for information on selecting the appropriate Carousel options for your application.
3. ** Products are no longer in production. Follow the links above to the product page to retrieve manuals and application notes for these older products.

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 SBE 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 SBE 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; Replaced by SBE 37-SMP-ODO in 2014
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
HydroCAT C-T-(DO)-(P) Recorder C, T, P* Integrated Optical DO* 8 Mb RS-232 & SDI-12 Integral pump; for Coastal applications to 350 m
HydroCAT-EP
C-T-pH-(DO)-(P)-(Chl)-(NTU) Recorder
C, T, P* Integrated pH, Optical DO*, Chlorophyll*, Turbidity* 16 Mb RS-232 & SDI-12 Integral pump; for Coastal applications to 350 m
SeapHOx Ocean C-T-DO-pH (P) Recorder C, T, P* Integrated Optical DO, pH 8 Mb RS-232 37-SMP-ODO with SeaFET pH sensor; to 50 m
Deep SeapHOx Ocean C-T-DO-pH (P) Recorder C, T, P* Integrated Optical DO, pH 8 Mb RS-232 37-SMP-ODO with Deep SeaFET pH sensor; to 2000 m
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; Replaced by SBE 37-IMP-ODO in 2014
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
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 39plus-IM Temperature (P) Recorder T, P*   64 Mb   Inductive Modem & USB  
SBE 39-IM Temperature (P) Recorder T, P*   32 Mb   Inductive modem Replaced by SBE 39plus-IM in 2016
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.