SBE 49 FastCAT CTD Sensor

The SBE 49 FastCAT is an integrated CTD sensor intended for use as a modular component in towed vehicles, ROVs, AUVs, or other autonomous platforms that can supply DC power and acquire serial data. It is an easy-to-use, light, and compact instrument, well suited to even the smallest vehicle. FastCAT must be externally powered, and its RS-232C data saved or telemetered by the vehicle to which it is mounted. FastCAT does not support auxiliary sensors; if such sensors are required, the user’s vehicle must be equipped to acquire their signals independently. FastCAT’s pump-controlled, TC-ducted flow feature minimizes salinity spiking, and its 16 Hz sampling provides very high spatial resolution of oceanographic structures and gradients. Measured data and the derived variables of salinity and sound velocity are output in real-time in engineering units or raw HEX.

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Key Features Specifications Resources Content

Key Features

Conductivity, Temperature, and Pressure at 16 Hz (16 samples/second) or polled sample acquisition Integral pump RS-232 interface, no memory or batteries—intended for use on vehicles that can supply power and acquire data Unique flow path, pumping regimen, and (optional) expendable anti-foulant devices, for maximum bio-fouling protection Pump-controlled, T-C ducted flow to minimize salinity spiking Programmable real-time processing (aligning, filtering, and correcting for conductivity cell thermal mass effects) provides high-quality data for applications where post-processing is not feasible. Depths to 350, 7000, or 10,500 m Seasoft© V2 Windows software package (setup, real-time data acquisition, and data processing) Five-year limited warranty

Parameters Measured

Specifications

Specification	Value
Communication Options	RS-232
Depth Rating (Meters)	350m
Power Source	External
Housing Material Options	Plastic, Titanium
Connector	MCBH
Sampling Rate	16 Hz (16 samples/sec)
Power Consumption	Input power: 0.75 Amps at 9-24 VDC Turn-on transient: 750 mA Sampling and transmitting (includes pump): 350 mA at 9 V; 285 mA at 12 V; 180 mA at 19 V
Accuracy	Conductivity ± 0.0003 S/m Temperature ± 0.002 °C Pressure ± 0.1% of full scale range
Software	Seasoft© V2
Resolution	Conductivity 0.00005 S/m (most oceanic waters; 0.4 ppm in salinity) Temperature 0.0001 °C Pressure 0.002% of full scale range
Biofouling Protection	Yes