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magnetic方位记录标记

DST magnetic - compass, tilt, temp & depth logger

Magnetic, tilt, depth & temperature

Overview

Key features

Earth's magnetic field strength data displayed in addition to compass heading, tilt (3-D axis), acceleration, depth and temperature

Used for geolocation analysis of fish and for monitoring movements of buoys and underwater gear

Available with an adjustable housing that keeps the logger in a fixed position inside and allows for more flexible mounting options as well as protecting the logger

Available with a tag holder kit when used in fish tagging projects

Available with various pressure ranges up to 3000 m

Description

The DST magnetic is a small data logger / archival tag that measures and records earth's magnetic field strength (in three directions), tilt (in three directions), acceleration, temperature and depth. From the magnetic field strength measurements a relative magnetic field vector is calculated, which can be put into models to find longitude and latitude of the tagged fish. It is also a useful tool for recording compass directions. DST magnetic is also used in studies of various gear and equipment.

Measurements are stored in the logger‘s internal memory with a real time clock reference for each measurement. The advantage of the DST magnetic is that it has the third vector for magnetic field strength (3-D magnetic). DST magnetic has full compass heading tilt correction so accuracy is maintained when tilting away from its horizontal position.

When used on fish the tag can either be implanted or attached externally, for studying their habitat movements and migration routes. For external tagging Star-Oddi can provide a specially designed DST fastener kit.


Sensors

Magn. field strength (3D), tilt (3D), temp, 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

26,158 measurements if magnetic-tilt and temp-pressure are recorded simultaneously

Memory capacity bytes

392,379 bytes / temperature-pressure 3 bytes, compass (MFS)-tilt 12 bytes

Memory management

- Custom programming
- Primary and secondary parameter

Data resolution

12 bit TD, 12 bit magnetic field strength (compass), tilt

Compass resolution

Compass accuracy

+/-15° heading with tilt correction on compass up to +/-45° from horizontal plane

Temperature resolution

0.032°C (0.058°F)

Temperature accuracy

+/-0.1°C (0.18°F)

Tilt resolution

0.05°

Tilt accuracy

+/-3°

Temperature range

-1°C to +40°C (30°F to 104°F)

Temperature response time

Time constant (63%) reached in 20 sec.

Standard depth ranges

0.1m-50m
0.1m-100m
1m-270m
5m-800m
5m-1500m
10m-3000m

Depth resolution

0.03% of selected range

Depth accuracy

+/-0.6% 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

Up to 7 different intervals can be programmed within a measurement sequence

Communications

Communication Box, RS-232C 9 pin serial or USB

Attachment hole

0.9 mm (in diameter)

Tilt range

+/-90° (180° span)

Magnetic field strength range

0 to 2 gauss

Magnetic field strength resolution

100nT

Magnetic field strength accuracy

+/-300nT

Battery life

3 years**

* Pressure & temperature sensors optional.
** For sampling interval of 10 minutes; MFS-tilt, and temp-pressure recorded simultaneously.
Specifications may change without notice.

 


http://www.star-oddi.com/products/36/magnetic-field-strength-tag/default.aspx

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