SBE 911plus CTD

The SBE 911plus CTD is the primary oceanographic research tool used by the world’s leading institutions, providing 24 Hz sampling with an SBE 9plus CTD Unit and SBE 11plus V2 Deck Unit. The 911plus system provides real-time data collection over 10,000 meters of cable (single- or multi-conductor electro-mechanical sea cable, slipring equipped winch, and computer for data display and logging supplied by user). The 911plus is easily integrated with an SBE 32 Carousel Water Sampler for real-time or autonomous auto-fire operations. The 911plus’ pump-controlled, T-C ducted flow minimizes salinity spiking caused by ship heave and allows for slow descent rates without slowing sensor responses, improving dynamic accuracy and resolving small scale structure in the water column. One Conductivity and one Temperature sensor (fitted with TC Duct and constant-flow pump) are included. An optional second (redundant) pair of T and C sensors and pump can be easily installed. The 911plus supports numerous auxiliary sensors (dissolved oxygen, pH, turbidity, fluorescence, oil, PAR, nitrates, altimeter, etc.) with eight A/D channels.

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Key Features Specifications Resources Content

Key Features

SBE 9plus CTD Unit for depths to 0-10,500 m or 15,000 psi*, with:
SBE 3plus premium Temperature sensor, SBE 4C Conductivity sensor, Digiquartz® Pressure sensor, SBE 5T pump.
Communication and power support for up to eight auxiliary voltage sensors.
Interface for dual C & T sensors (sensors optional).
Modem channel for real-time SBE 32 Carousel Water Sampler control.
Stainless steel protection cage. SBE 11plus Deck Unit with NMEA 0183 interface for GPS data, 12-bit A/D channel for surface PAR sensor, 115/230 VAC operation, LED readout for raw data, audible bottom contact or altimeter alarm, remote pressure output (useful as input signal for towed vehicle control), programmable serial data output with up to seven variables in engineering units, free-standing cabinet, and kit for mounting in a standard 19-inch electronics rack.
Seasoft© V2 Windows software package (setup, data upload, real-time data acquisition, and data processing).
Five-year limited warranty. *Lower pressure ranges are available. Accuracy of the pressure sensor is dependent on the sensor’s range.

Parameters Measured

Specifications

Specification	Value
Communication Options	RS-232
Depth Rating (Meters)	6800m, 10500m
Power Source	External
Housing Material Options	Aluminum, Titanium
Connector	MCBH
Sampling Rate	24 Hz (24 samples/sec)
Power Consumption	9-24 VDC, 0.29 watts
Accuracy	Conductivity: 0.0003 S/m; Temperature: 0.001 °C; Pressure: 0.015% of full scale range
Software	Seasoft© V2
Resolution	Conductivity: 0.00004 S/m; Temperature: 0.0002 °C; Pressure: 0.001% of full scale range