Ultra mini submersible data logger with temperature & depth sensor - Star-Oddi

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DST micro-TD small temperature and depth data storage tag

Data Storage Tag micro Temperature and Depth


Key features

  • Suitable for tagging smolts and small fish or marine animals
  • Can fit into small containers or vessels for sampling underwater
  • Custom defined text printed on housings for recapture purposes
  • Dimensions only 25.4 mm x 8.3 mm
  • Long battery life in a small tag, typically 28 months


The DST micro-TD is an ultra small temperature and depth (pressure) data storage tag. The recorded data is stored in the logger‘s internal memory with a real time clock reference for each measurement.

The data logger 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 the software, 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 (pressure) are recorded as pairs. Optionally, they can be set 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 in the supporting software 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.

Examples of Application

DST micro-TD is designed as a small archival tag for for fish and marine animal tagging, providing valuable scientific data on the specie being studied. The small sized DST enables fish biologists to tag smaller species and smolts that little information exist on. DST micro-TD is also used as a stand-alone logger in situations where it can be fit into tight spaces for sampling.

DST micro-TD is suitable for various studies:

  • Fish and marine animal tagging (internally or externally)
  • Agricultural and cattle research projects
  • Temperature and pressure measurement in liquids, vials, and vessels (containers).
  • Any other field where temperature and pressure recording is required

You can read more about research studies and other applications of the DSTs here.

Technical Specifications

SensorsTemperature and pressure (depth)
Size (diameter x length)8.3mm x 25.4mm
Housing materialAlumina (Ceramic)
Weight (in air/in water)in air: 3.3g
in water: 1.9g
Memory typeNon-volatile EEPROM
Memory capacity87,168 measurements in total*
Memory capacity bytes130,752 bytes / temperature 1.5 bytes, pressure 1.5 bytes
Memory management- Custom programming
- Primary and Secondary parameters
Temperature resolution0.032°C (0.058°F)
Temperature accuracy +/- 0.2 °C (+/- 0.36°F)
Temperature range-1 to +40°C (30.2°F to 104°F)
Temperature response timeTime constant (63%) reached in 8 sec.
Standard depth ranges1m-150m
5m-1000 m
Depth resolution0.08% of selected range
Depth accuracy +/- 0.6% of selected range
Depth response time Immediate
Data retention25 years
ClockReal time clock
Accuracy +/-1 min/month
Sampling intervalIn second(s), minute(s) or hour(s)
Number of different sampling intervals1 to 7
CommunicationsCommunication Box, wirelss transmission when DST sits in the box. Connection: USB cable
Attachment hole(diameter) 0.5 mm
Battery life28 months**
* Divided between two parameters
** For sampling interval of 10 min; temperature and pressure recorded simultaneously.
Specifications may change without notice.

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