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3-COMPONENTS AUTONOMOUS VECTOR MAGNETOMETER LEMI-301 FOR SEAFLOOR APPLICATION

Main features:

High resolution
Low noise
Low temperature offset
Tilt angles measurement
Full automatic compensation
RS - 232 output
Timing by internal clock
Internal flash memory
Convenience of installation and service

LEMI-301

LEMI -301 vector magnetometer is produced on the base of fluxgate sensor, all three components of which are implemented  into one body. Non-magnetic housing and minimal magnetism of components enable the instrument to be implemented as a monoblock construction where the electronic unit is placed close to the sensor. Automatic compensator provides convenient compensation of the initial field offset and reading of full value (6 digits) of the measured field. Timing by internal clock provides high accuracy synchronisation of data. The internal flash memory can provide long-term autonomous data storage. The system also has two-axes tilt measurement. Using the developed software it allows to reduce the magnetometer data collected in randomly oriented coordinate system to the data in the frame system connected with geomagnetic coordinates.

Technical Specifications

Resolution

0.1 nT

Full measuring range 65000 nT
Bandpass DC-0.3 Hz
Noise level in the frequency band 0.1 - 1 Hz, rms <20 pT
Sample interval of data storage 1,5,10,60 s
Sensor orthogonality error <30 min of arc
Temperature drift <0.2 nT/ C
Maximal operation depth 200 m
Operating temperature range 0 … 40 C
Power consumption less 1.5 VA
Weight:
waterproof housing
electronic unit with sensor

10 kg
1 kg
Tiltmeter characteristic:
Resolution
Dynamic range

0.3 grad
30 grad


Last modified: 15-12-2005

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