Salinity, Temperature and Depth Data Loggers, Archival Tag, Fish Tags

DST GPS - Data Storage Tag (DST)
DST GPS measures temperature, pressure (depth) and listens to an acoustic GPS signal from sonar. Data is stored in a non-volatile internal memory. All recordings are time related, utilising a real time clock inside the recorder.

The DST GPS is equipped with unique user specified features for optimising the tag's performance when receiving GPS position.

With the use of the communication box and the SeaStar software, the user programs the DST GPS with start date/time and sampling interval
Programming option of up to 7 sampling intervals and number of samplings within each interval
Option for defining a special interval, making the tag shift to a different sampling interval after each received GPS position
The DST GPS can be programmed to perform a series of measurements at a detection of a position
When programming the tag, the user gets information in the software on the tag's memory usage and the expected battery lifetime

The GPS system has been tested in co-operation with researchers and research institutes in Norway and Iceland.

Click here for related equipment:
Fish Positning Sounder (FPS) and Simrad sonar

Further information about the system and case studies

Technical Specifications - DST GPS (Position, Depth and Temperature recording fish tag)

Sensors	GPS acoustic receiver, temperature & depth
GPS receiving radius: -From SP70 Sonar (Simrad) -From Star-Oddi Fish Positioning Sounder	<4 Km distance radius <600 m
Size (diameter x length)	15 mm x 46 mm
Weight (in air/in water)	20.4g / 13g
Total memory capacity:	174,300 recordings*
Memory	110K (80k GPS + 30K TD)
Memory type	Non-volatile EEPROM
Temperature range	-1°C to +40°C (30°F to 104°F)
Resolution temperature	0.032°C (0.058°F)
Accuracy temperature	+/-0.1°C (0.18°F)
Depth range	Up to 3000 m**
Standard depth ranges	30m, 50m, 100m, 300m, 500m, 800m, 2000m, 3000m
Resolution depth	0.03% of full scale (FS)
Accuracy depth	+/-0.4% of selected range +/-5 cm (5mbar)
Clock	Real time clock. Accuracy +/-1 min/month
Sampling interval	User programmable in the SeaStar software
Number of intervals	1 to 7 different intervals
Communications	RF wireless through the communication box
Battery life	3 years***
Data retention	25 years
Attachment hole	0.9 mm (in diameter)

* Divided by the three parameters. Number of positions recorded will depend on number of times the tagged fish is within the range of GPS sonars/transmitters.
**Customer specified.
*** Depending on programmed sampling interval.

Specifications may change without notice.