CTD-Model SD 208
The SD208 measures, calculates and records sea water conductivity, salinity, temperature, depth (pressure), sound velocity and water density. Three optional sensors can be added, f. example: dissolved oxygen, fluorescence and turbidity. For optional sensors with several sensitivity ranges, the SD208 has auto range capability to automatically obtain the best sensitivity. The programmed settings and calibration coefficients are maintained in nonvolatile eeprom, and will not be changed/lost if power is disconnected. Data is recorded in physical units and simultaneously transmitted via an RS232 I/O watertight connector for on-line use or wireless serial communication by built-in radio.
Manufacturer
SAIV A/S Environmental Sensors & Systems
Post Box 3513
5845 Bergen
Norway
+47 56 11 30 66
+47 55 94 31 94
+47 56 11 30 69
+47 55 94 31 95
Technical specifications
| Depth range | 6000m |
| Max. pressure | 500, 1000, 2000, -- 6000 m |
| Housing material | Vacuum molded polyurethane and titanium |
| Power supply | 2 ea. 3.6V lithium C-cells. |
| Power consumption | 10-30VDC |
| Weight | In air: 2 kg. In water: 0.8 kg. |
| Size | Length 400 mm. Diameter 60 mm |
| Memory | 56000 data sets of STD/CTD (CMOS SRAM) |
| Calibration | |
| Sampling rates | 1 sec to 180 min |
| Communications | Cable: RS232 ASCII code. Wireless: 868 Mhz RS232(range 50m) |
| Download speed | |
| Conductivity range | 0 to 80 mS/cm |
| Conductivity accuracy | +/- 0.003 mS/cm |
| Temperature range | -2 to +40°C |
| Temperature accuracy | +/- 0.003°C |
| Depth accuracy | 0.01 dbar (m) |