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3-COMPONENT PRECISION MAGNETOMETER
LEMI-018
LEMI-018 vector magnetometer for the precise measurement of Earth's
magnetic field and its variations at laboratory and land conditions as well
as in geomagnetic observatory is produced on the base of flux-gate sensor,
all three components of which are implemented in the same body. It consists
of two units - sensor unit in waterproof housing and electronic unit mounted
in PELI case, both connected by the cable. The electronic unit provides
automated operation - acquisition, processing and storage in the embedded SD
card of data about magnetic field and its variations and/or their
transmission to the external user via USB interface. Built-in GPS receiver
assures satellite synchronization of the internal clock and the coordinates
of magnetometer location are also registered. It allows organizing the
synchronous operation of a set of the magnetometers installed at the studied
area. The big volume of internal non-volatile memory for data recording and
small power consumption permits using this magnetometer for long-term
autonomous operation in land conditions. Other options, e.g., tilt
compensated sensor version, for observatory and laboratory use with leveling
facilities, hermetic version etc. exist too.
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MAIN TECHNICAL PARAMETERS
Data Logger |
Frequency band |
DC-0.5 Hz |
Sample rate |
1 per s |
SD card |
32 GB |
Digital output and control |
USB |
GPS timing, coordinates and
altitude determination |
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Operating temperature range |
Minus 20 to +60°C |
Power supply |
(5-20) V |
Power consumption |
<0.5 W |
Weight |
2.0 kg |
3-component
Flux-Gate Magnetometer |
Measured range at analog output |
±70000 nT |
Frequency band for magnetometer |
DC-10 Hz |
Transformation factor of analog
output |
20 µV/nT |
Noise level at 1 Hz |
≤10 pT/√Hz |
Temperature drift |
< 0.3 nT/°C |
Components orthogonality error
(without compensation) |
< 30 min of arc |
Operating temperature range |
minus 20 to + 55° C |
Power consumption |
< 0.5 W |
Power supply |
5 V ±0.1V |
Weight: sensor with 20 m cable |
~5 kg |
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