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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 with adjustable or suspended support and electronic
unit both connected by the cable. The electronic unit allows automated
operation - acquisition, processing and storage of data about magnetic field
and its variations and their transmission at request to the external user
via RS232 interface or by the embedded FLASH card. Built-in GPS receiver
provides satellite synchronization of the internal clock and the coordinates
of magnetometer location. It allows organizing the synchronous operation of
a set of the magnetometers installed at the studied area. The considerable
volume of internal non-volatile memory for data recording and small power
consumption permits to use the magnetometer for long-term autonomous
measurements in land conditions. Several sensor options, e.g., tilt
compensated sensor, for observatory and laboratory use with leveling
facility, hermetically sealed
sensor etc. may be selected (in the figure).
The program to transfer data
into INTERMAGNET format and installation/training service may be offered
(optional).
Innovative Aspect
and Main Advantages
The developed
magnetometer has numerous know-hows implemented and allows to reach minimal
possible sensitivity threshold in comparison with other known competitive
versions on the market. Other major advantage is that simultaneously lowest
possible consumed power of the magnetometer is provided what makes these
devices indispensable for autonomous systems. The magnetometer and sensor
have waterproof housings and can operate in wide temperature range
autonomously up to 512 days. Serious advantage is also very competitive
price – no more than 70% of regular market price for competitive devices.
Areas of Application
LEMI-018 can be used
for magnetic geophysical research in fundamental branch of science and for
deposits exploration using the sounding of Earth’s crust in land conditions
and in observatories as basic magnetometer as well as for magnetic repeat
stations survey.
Stage of
Development
LEMI-018 is already
on the market. LC ISR produces them for individual orders in the amount of
10-50 pieces per year.
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MAIN TECHNICAL PARAMETERS
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Measuring ranges of total magnetic field |
± 68
000 nT |
Resolution along each
component at the display, digital output
and FLASH card data |
0.01 nT |
| Noise level at (0.03 - 0.3)
Hz frequency band |
< 15 pT rms |
| Long-term
zero drift |
<
±
5 nT/year |
| Temperature drift |
<0.2 nT/°C |
| Components orthogonality
error |
< 30 min of arc |
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Sample rate |
1 per s |
| Samples averaging
(by PC software) |
2, 5, 10 ,15 ,20 ,30 ,60 |
| CompactFlash Card volume (CF
FAT16) |
2
GB |
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Operating temperature range |
minus 20 to +60° C |
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Power supply, battery |
10-18
V |
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Power consumption |
<
0.8 W |
Weight: sensor with support
electronic unit |
1.2 kg
1.8 kg |
| Length of
connecting cable between magnetic sensor and electronic unit |
10 m
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| Length of
connecting cable between GPS antenna and electronic unit |
3 m
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*
-
other values possible to realize on demand.
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