Archival tag with depth and temperature sensors
DST milli-L depth temperature archival tag
Low cost archival tag depth temperature
- Low cost depth and temperature archival tag for fish and marine animal tagging where large quantities are needed
- Custom defined text marked on housings for recapture purposes
- Tag holder kits available for external attachment on fish
- Dimensions 38.4 mm x 13 mm
- Option for memory extension up to 1,398,100 measurements in total
- Long battery life, typically over 3 years
The temperature depth recording archival tag stores the data in its internal memory with a real-time reference for each measurement. With recapture of the tagged animal the data from the tag can be downloaded into a PC computer.
DST milli-L archival tag 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 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 data storage tag the 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 housings for use at fixed locations or gear.
For more information about accessories please click here.
Features on Request
All DST milli loggers are available with an extended memory capacity of either 682,000 measurements in total (FLASH memory, DST milli-F) or 1,400,000 measurements. Total memory size is divided between the two sensors temperature and depth. Please note that the FLASH memory consumes a little more energy from the batteries.
Temperature calibration outside standard range
It's possible to extend the temperature calibration outside standard range upon request.
Examples of Application
DST milli-L is an ideal low cost temperature depth logger for fish or marine animal tagging projects, where large quantities of archival tags are needed at reasonable cost. For recapture purposes Star-Oddi marks each electronic fish tag with a custom defined text containing information on how to return tags and reward (if any). The DST milli-L can also be deployed subsea at moorings, fastened to fishing gear or other underwater equipment, collecting valuable data.
The DST milli-L is suitable for studies within:
- Fish and marine animal tagging (internally or externally)
- Marine biology
- Ecosystems research
- Temperature and pressure measurement in liquids, vials etc.
- Any other field where temperature and pressure recordings are required
You can read more about research studies and scientific papers here.
|Sensors||Temperature and pressure (depth)|
|Size (diameter x length)||13mm x 38.4mm|
|Housing material||Biocamptible alumina (Ceramic)|
|Weight (in air/in water)||in air: 9.2g|
in water: 5g
|Memory type||Non-volatile EEPROM|
Optional FLASH memory
|Memory capacity||87,168 measurements in total (standard) *|
FLASH memory options:
698,708 measurements in total (1 MB) *
1,398,100 measurements in total (2 MB) *
|Memory capacity bytes||130,750 bytes / temperature 1.5 bytes, pressure 1.5 bytes *|
|Memory extension option||1 MB (1,048,064 bytes) FLASH memory *|
2 MB (2,097,152 bytes) FLASH memory *
|Memory management||- Custom programming of intervals|
- 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||-1°C to +40°C (30°F to 104°F)**|
|Temperature response time||Time constant (63%) reached in 12 sec.|
|Standard depth ranges||0.1m-50m, 0.1m-100m, 1m-250m, 5m-500m, 5m-800m|
|Depth resolution||0.03% of selected range|
|Depth accuracy||+/- 0.8% of selected 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||Single interval throughout measuring period|
or multiple intervals (up to 7) where number of measurements is defined within each interval
|Communications||Communication Box, RS-232C 9 pin serial and USB|
|Attachment hole||0.9 mm (in diameter)|
|Battery life||3 years***|
** Outside ranges available upon request.
*** For sampling interval of 10 minutes, temperature & depth recorded simultaneously. Specifications may change without notice.