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Compass, Tilt (3D), Temperature and Depth Archival Tag
Small, long life archival magnetic tag measuring compass, tilt, temperature and depth. Multiple sensors in small sized tag.
For long term fish tagging studies, this is one of a kind tag due to its measuring capabilities, with a compass sensor in addition to tilt, temperature and depth logging.

• Key features:
• Smallest compass magnetic archival tag on the market
• Various depth sensors, from shallow to deep sea
• Tag holding kit for external fish tagging
• User defined text on the housing

Product Details

• This miniature compass archival tag measures and records earth’s magnetic field strength and tilt in three directions, giving the compass measurements. Additionally it measures depth (pressure) and temperature. The logger is only 46 mm in length and 15 mm in width.
• DST magnetic is designed as a fish archival tag for geolocation studies, longitude latitude estimates and migration route tracking of fish and marine animals. It enables scientists to gain valuable information on migration routes and behavioural patterns over a long period of time. The tag can be implanted or tagged externally.
• Customers choose between depth calibration up to: 50 m, 100 m, 270 m, 800 m, 1500 m or 3000 m. The shallower the range the better the resolution and accuracy.
• A tag holder kit is available for the tags, to make the tagging process easier. It also increases the safety for the fish.
• For tag and release of animals into the wild the tags can have a customized text on the housing, for recapture purposes. This is especially important when the tags are used on commercially fished species, so that fishermen can return a tag with valuable data to the scientist.

Using the logger

• The compass logger and the accompanying items are designed for ease of use throughout the research process, from setting up the logger, attaching it, to retrieving and analysing the data. The logger is supported by the SeaStar software and a Communication Box which have to be purchased with the first order.
• To launch the logger for measuring it is placed into the Communication Box interface that connects with a USB cable to a PC computer. In the SeaStar software, the user sets the start time, start date and sampling interval before starting the logger in measurement mode. The logger synchronizes its internal clock with the date & time on the computer being used.
• With default programming the logger is measuring compass, tilt, depth and temperature simultaneously. Optionally Compass-Tilt and Temp-Depth can be uncoupled, set as primary and secondary parameter pairs with different sampling frequency. That way memory partitioning can be customized according to individual preferences.
• There are two modes for sampling, either at a single interval throughout the period or multiple intervals. When choosing multiple interval programming it is possible to define up to seven different intervals and number of measurements for each interval. Shifting between wide and narrow intervals can help in extending the measuring period due to memory limitation and have more frequent measurements during certain time periods.
• The software automatically calculates when memory fills up based on certain interval settings, making it easier for the user to decide how to program the logger. Estimation on battery consumption during that time period is also calculated.
• After recovering the logger, it is inserted into the communication box and the recorded data is uploaded to the software. The results are displayed both in graphic and tabular form and the data can be exported to other programs. The time series data shows each measurement with its own time stamp.
• After data retrieval the logger can be reused, as long as the batteries inside last. Battery life estimation is always reported upon connection with the logger. Due to the low energy consumption circuitry design the battery life is long, but actual lifetime depends on usage and sampling interval used.

Accessories

• Communication box: Serves as an interface between the DST and a PC computer. Used for connecting to the DST, starting the logger and retrieving data. DST is inserted into the hole of the box for wireless communications. The box comes with a USB cable for connecting to a PC computer.
• SeaStar software: For Windows, needed to operate the DST. Data is displayed in a graph and table. The time series data file can be opened in other programs. An installation product key is provided when ordering the software, for online downloading.
• Patternfinder analysis software: Graphic data analysis software designed to save the users resources by making data analysis more efficient and easier. Allows periodic statistic analysis of time series data, signal filtering and operations, overlaying and analyzing multiple signals and event and pattern analysis. Retrieved data can be transferred from SeaStar over to PatternFinder with one button click.
• Fish and Marine Animal Tag Holder Kits for External Tagging:
  • Plate holder kit: Consists of wire fasteners, a plastic plate for holding the tag, a plastic plate on the opposite side, and silicon pads for external attachment on fish and other subjects. The plastic plates have smooth edges, specially designed for external attachment on animals. Silicone pads underneath give further comfort to the animal’s skin. Star-Oddi can also provide needles, for threading wires through the fish. The plate holder kit is available for the centi and milli sized loggers. Weight of the fastening kit is ca. 15 g. in air. Various thickness of wires is available.
  • Capsule holder kit: A plastic capsule that has 2 mm holes on each end, ensuring water flow to the sensors. In addition to the capsule the kit comes with a wire harness, plastic plate and two silicone pads for placing under the capsule to prevent descaling and the plastic plate. The capsule holder kit is available for all logger sizes: centi, milli and micro.
• Floating Device for DST: Star-Oddi offers a floating device for the data storage tags. They can be used both for internal and external tagging of fish and marine animals. For internal tagging the cylinders can be coated with biocompatible material. They can also be painted with bright colours for more visibility (non biocompatible).

Technical Specifications

• Sensors: Magnetic field strength (3D), tilt (3D), temperature, depth*
• Size (Diameter x Length): 15mm x 46mm
• Housing Material: Biocompatible alumina (Ceramic)
• Weight (in Air/in Water): 19g/12g
• Data Resolution: 12 bits for temp/depth, 14 bits for magnetic field strength (compass) and tilt
• Compass Resolution: 1°
• Compass Accuracy: +/-15° heading with tilt correction on compass, up to +/-45° from horizontal plane
• Magnetic Field Strength Range: 0 to 2 gauss
• Magnetic Field Strength Resolution: 100nT
• Magnetic Field Strength Accuracy: +/-300nT
• Tilt Range: +/-90° (180° span)
• Tilt Resolution: 0.05°
• Tilt Accuracy: +/-3°
• Temperature Range: -1°C to +40°C (30°F to 104°F)
• Temperature Resolution: 0.032°C (0.058°F)
• Temperature Accuracy: +/-0.1°C (0.18°F)
• Temperature Response Time: Time constant (63%) reached in 20 sec.
• Standard Depth Ranges: 50m, 100m, 270m, 800m, 1500m, 3000m
• Depth Resolution: 0.03% of selected range
• Depth Accuracy: +/-1% of selected range
• Depth Response Time: Immediate
• Memory Type: Non-volatile EEPROM
• Memory Capacity: 104,634 measurements**
• Memory Capacity Bytes: 392,379 bytes / temperature-pressure 3 bytes, compass (MFS)-tilt 12 bytes
• Measurement Interval: User specified in second(s) minute(s), or hour(s)
• Minimum Measurement Interval: 1 second
• Multiple Intervals Option: Up to 7 different intervals
• Measurement Options (Primary/Secondary): Temp/depth as primary, CompTilt as primary
• Data Retention: 25 years
• Clock: Real time clock. Accuracy +/-1 min/month.
• Communications: Communication Box, wireless transmission when DST sits in the box. Connection to PC: USB cable.
• Attachment Hole: 0.9 mm (diameter)
• Battery Life: 3 years***
• Replaceable Battery: No

*Pressure & temperature sensors optional.
**Divided between the number of sensors
*** For sampling interval of 10 minutes; MFS-tilt, and temp-pressure recorded simultaneously.
Warranty: 12 months.
Specifications may change without notice.