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VERY LOW NOISE INDUCTION MAGNETOMETER FOR GEOPHYSICAL APPLICATION LEMI-102

VERY LOW NOISE INDUCTION MAGNETOMETER FOR GEOPHYSICAL APPLICATION LEMI-102

Main features:

bulletHigh sensitivity
bulletLow noise, near the theoretically lowest possible level
bulletWide frequency band
bulletSwitched types of amplitude-frequency response
bulletNew methodology of correction of linear amplitude-frequency response
bulletSuppression of 50 (60) Hz interference
bulletLow power consumption
bulletRuggedized and waterproof
bulletMetrological certification

 

Frequency Response Noise Level
Frequency Response Noise Level

 

     The magnetic feedback design is utilized what provides a stable response over several decades of frequency.  Three types of frequency response (see fig.) are possible to switch: linear-flat (1), extra-flat (2) and ultra-linear (3).  Over the flat band region the sensor operates as a B field detector; for the frequencies below the flat part the sensor response is linearly proportional to signal frequency or to dB/dt derivative.  A matched low noise preamplifier is connected to the coil inside the waterproof case and is powered from the connector by 12 V power supply.

 

Technical Specifications:

Frequency range 0.0001 to 200 Hz
Sensitivity:

types 1,2 (flat part)
type 3 (linear part)

 

20 mV/nT
20 mV/nT*Hz

Power consumption 20 mA at 12 V
Length, cm 120
Weight, kg 15
Diameter, cm 10
Cable length, m 200

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Last modified: 03-11-2014

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