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SBE 21 SeaCAT Thermosalinograph
The externally powered SBE 21 accurately determines sea surface temperature and conductivity from underway vessels. Data is simultaneously stored in memory and output to a computer in real-time. Typically mounted near the ship’s seawater intake, the SBE 21 connects to an AC-powered interface box near a computer. The interface box provides power and an isolated data interface, and contains a NMEA 0183 port for appending navigation data. Memory capacity exceeds 10.6 million samples of temperature and conductivity; real-time output continues after the memory is full.
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Key Features
- Conductivity, Temperature, and auxiliary sensor data (SBE 38 remote temperature sensor and up to 4 voltage output sensors), continuously at 4 Hz (averaging, storing, and transmitting data at user-programmable 3-to 600-sec intervals) or taking a single measurement at user-programmable 3- to 600-sec intervals.
- Internal memory, powered externally.
- Expendable anti-foulant devices for bio-fouling protection.
- Valve control of seawater circulation and fresh-water flushing; sensor assembly easily removed for cleaning and calibration.
- Seasoft© V2 Windows software package (setup, and data acquisition, upload, and processing).
- SeaCAT family, field-proven since 1987.
- Five-year limited warranty.
Parameters Measured
Specifications
| Specification | Value |
|---|---|
| Communication Options | RS-232 |
| Housing Material Options | Pvc |
| Onboard Memory | Yes |
| Connector | MCBH |
| Sampling Rate | 4 Hz (averaging, storing, and transmitting at user-programmable 3-to 600-sec intervals); or single measurement at user-programmable 3-to 600-sec intervals |
| Memory Capacity (Samples) | T & C: 10.6 million samples; T, C, SBE 38, & 4 voltage sensors: 3.7 million samples |
| Power Consumption | 9-14 VDC |
| Accuracy | Conductivity ± 0.001 S/m Temperature, primary ± 0.01 °C Temperature, SBE 38 remote ± 0.001 °C |
| Software | Seasoft© V2 |
| Resolution | Conductivity 0.0001 S/m Temperature, primary 0.001 °C Temperature, SBE 38 remote 0.0003 °C |
| Biofouling Protection | Yes |
Accessories
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