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.
| Part |
Measurement Range |
Initial Accuracy |
Resolution |
| Conductivity (S/m) |
0-7 |
±0.001 |
0.0001 |
| Temperature (°C) |
-5 to +35 |
±0.01 |
0.001 |
| Temperature, SBE 38 remote (°C) |
-5 to +35 |
±0.001 |
0.0003 |
|
