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HIGH FREQUENCY LOW NOISE SEARCH-COIL
MAGNETOMETER LEMI-157

Main features

bulletWide frequency range:
1 100 kHz
bulletVery low noise
bulletLow power consumption
MAGNETOMETER LEMI-157

Three-axis search-coil magnetometer (SCM) LEMI-157 is intended for the measurements of the three
orthogonal components of magnetic field fluctuations in the frequency band 1 ... 100 kHz during high
frequency geophysical studies. It can be used with any analogue measuring unit.

TECHNICAL SPECIFICATION

Frequency band of received signals 1 - 100 kHz
Shape of transfer function flat
Transformation factor1 25 mV/nT
Transformation factor error < 6 dB
Crosstalk < 10 %
Magnetic noise level
at 1 kHz,
at 10 kHz,
at 20 kHz
at 100 kHz

≤ 0.1 pT/√Hz
≤ 0.05 pT/√Hz
≤ 0.03 pT/√Hz
≤ 0.03 pT/√Hz
Power supply voltage2 (7.512) V
Maximum output voltage 2 V
Power consumption <0.6 W
Temperature range of operation minus 20 to + 50 oC
Outer dimensions 50x50x50 mm
Weight < 0.3 kg

Notes:
1 The transfer function is experimentally derived and its values are given in the User Manual.
2 Power supply voltage must not exceed 8 V at the use of the 50 Ohm load in order
to avoid preamplifier overheating.

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Last modified: 23-02-2022

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