Low cost temperature sensor & pressure sensor, biocompatible

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DST milli - L

Data Storage Tag milli L, low cost TD logger

Overview

Dimensions (diameter x length): 12.5mm x 38.4mm
Sensors: Temperature, pressure (depth)
Standard temperature range: -1°C to +40°C
Temperature accuracy: +/-0.1°C
Depth ranges: 10cm to 20m, 10 cm to 50m, 10cm to 100 m, 1 m to 250m, 5m to 500m or 5m to 800m
Depth accuracy: +/-0.8% of selected range
Memory size: 87,000 measurements in total
Battery life: 3 years
Housing material: Alumina (implantable, biocompatible ceramic material)

Description

The DST milli-L is a miniature data logger that records temperature and pressure (depth).  Recorded data is stored in the logger‘s internal memory with a real-time reference for each measurement.

The DST milli-L 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 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 housings for use at fixed locations or gear.

For more information about accessories please click here.

Features on Request

Extended memory
All DST milli products are available with an extended memory capacity of 682,000 measurements in total (FLASH memory, DST milli-F). 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
Temperature calibration outside of standard ranges or for smaller ranges is available for all products on 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 tag with a custom defined text containing information on how to return tags and reward. The DST milli-L can also be deployed subsea at mooringsr, 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)
  • Oceanography
  • Marine biology
  • Agricultural and cattle
  • Hydrology
  • Ecosystems research
  • Temperature and pressure measurement in liquids, vials etc.
  • Pharmaceutical production (quality control)
  • Any other field where temperature and pressure recordings are required

You can read more about research studies and scientific papers here.

Technical Specifications

SensorsTemperature and pressure (depth)
Size (diameter x length)12.5mm x 38.4mm
Housing materialAlumina (Ceramic)
Weight (in air/in water)in air: 9.2g
in water: 5g
Memory typeNon-volatile EEPROM
Memory capacity87,000 measurements in total *
Memory capacity bytes130,750 bytes / temperature 1.5 bytes, pressure 1.5 bytes *
Memory extension option1,048,064 bytes (FLASH memory) *
Memory management- Custom programming of intervals
- Primary and secondary parameter
Data resolution12 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 timeTime constant (63%) reached in 12 sec.
Standard depth ranges0.1m-20m, 0.1m-50m, 0.1m-100m, 1m-250m, 5m-500m, 5m-800m
Depth resolution0.03% of selected range
Depth accuracy+/- 0.8% 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, RS-232C 9 pin serial and USB
Attachment hole0.9 mm (in diameter)
Battery life3 years***
* Total memory is divided between the two sensors.
** Outside ranges available upon request.
*** For sampling interval of 10 minutes, temperature & depth recorded simultaneously. Specifications may change without notice.

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