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T: 1 800 463-4363
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Miniature temperature and depth recorder

Miniature temperature and depth recorder

Product Code: DST centi-TD | Data Storage Tag

Need more Info? (514) 354-2511 - 1-800-463-4363

Key features
  • Suitable for monitoring behavior of fishing gear, tidal waves, fish tagging and geothermal well logging
  • Available with a plastic protective housing that gives more flexible mounting options
  • Various depth calibration ranges available, up to 3000 m
  • Long battery life, typically 7 seven years
  • Option for a start/stop recording at pre-defined depth level for saving on memory
  • Miniature size of 46 mm x 15 mm


The DST centi-TD is a miniature temperature and depth recorder. Recorded data is stored in the logger‘s internal memory with a time stamp for each measurement.

The DST centi-TD is supported by the SeaStar software and the Communication Box which serves as an interface between the logger and a PC. Communication between the logger and the Communication Box is wireless.

In SeaStar the user sets the start time, start date and sampling interval before starting the recorder. Up to seven different intervals can be set for the same measurement sequence. This is especially useful when more frequent measurements are needed at a certain time period. With default programming temperature and depth are recorded as pairs. Optionally, the two parameters can be set separately as primary and secondary parameters with different sampling frequency. That way memory partitioning can be customized according to individual preferences.

After recovering the DST recorded data is uploaded to SeaStar where results are displayed both in graphic and tabular form. After retrieving the data, the DST can be re-programmed and reused as long as the battery lasts.

A set of Communication Box and SeaStar software needs to be purchased with the first order.

Star-Oddi also offers protective logger housing for the DSTs that gives more flexible mounting options and protects the logger against knocks. The housing is ideal for use at fixed locations, underwater gear or in harsh environments. When used externally on fish in tagging project Star-Oddi can provide tag holder kits for the DST.


Features on request
Extended memory
DST centi-TD and DST centi-T can be delivered with an extended memory capacity of 523,800 measurements in total (DST centi-ex).
Logic feature
The Logic feature allows users to choose a depth limit where the logger starts and stops recording. The logger is in sleep mode while above the predetermined depth, saving memory and battery life. If the Logic feature is used in a logger all parameter measurements are taken at the same time – primary and secondary parameter settings are not possible. The logic feature can be applied on DST centi with extended memory (DST centi-ex), DST CTD and DST pitch & roll.
Temperature calibration outside standard range
Higher (extended) temperature calibration outside standard range is available upon request. It's possible to calibrate up to 80°C (192°F).


Examples of application
DST centi-TD can be used as a stand-alone logger for recording depth and temperature in ocean and freshwater environments.   The DST can be fastened to fishing gear, deployment lines, cables, moorings or other underwater equipment, collecting valuable data. The logger is also used for monitoring temperature and depth in geothermal boreholes. The shape of DST-centi TD is designed for tagging fish and marine animals, externally or internally with implantation providing information on fish behavior and migration. When used in in tagging projects the tags are marked with a pre-defined text for recapture purposes.

Examples of studies suitable for DST centi-TD:

  • Fish and marine animal tagging
  • Fisheries research
  • Geothermal well logging
  • Oceanography
  • Marine biology
  • Hydrology
  • Ecosystems research
  • Geology


Technical Specifications
Sensors Temperature and pressure (depth)
Size (diameter x length) 15mm x 46mm
Housing material Alumina (Ceramic)
Weight (in air/in water) in air: 19g
in water: 12g
Memory type Non-volatile EEPROM
Memory capacity 174,000 measurements in total*
Memory capacity bytes 261,819 bytes / temperature 1.5 bytes, pressure 1.5 bytes
Memory extension option 786,099 bytes (EEPROM memory)
Memory management
  • Custom programming
  • Primary and secondary parameter
Data resolution 12 bits
Temperature resolution 0.032°C (0.058°F)
Temperature accuracy +/-0.1°C (0.18°F)**
Temperature range -2°C to +40°C (28°F to 104°F)
Range can be extended up to 80°C (192°F)
Temperature response time Time constant (63%) reached in 20 sec.
Standard depth ranges 10cm-30m, 10cm-50m, 10cm-100m, 1m-270m, 5m-800m, 5-1500m, 10-2000m, 10m-3000m
Depth resolution 0.03% of selected range
Depth accuracy +/-0.4% of selected range for 30m to 270m range,
+/- 0.6% of selected range for 800m to 3000m range
Depth response time Immediate
Data retention 25 years
Clock Real time clock
Accuracy +/-1 min/month
Sampling interval In second(s), minute(s) or hour(s)
Number of different
sampling intervals
1 to 7
Communications Communication Box, RS-232C 9 pin serial and USB
Attachment hole 0.9 mm (in diameter)
Battery life 7 years***
*  Total memory is divided between the two sensors.
** Accuracy +/-0.2°C if range is 0-80°C.
*** For sampling interval of 10 minutes; temperature and pressure recorded simultaneously.
Specifications may change without notice.


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