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SM-30 Shirt Pocket-Size Magnetic Susceptibility Meter

A sensitive and accurate tool for field measurement of susceptibility of outcropping rocks, drill cores or rock samples.


A sensitive and accurate tool for field measurement of susceptibility of outcropping rocks, drill cores or rock samples.


  • High Sensitivity 1 x 10-7 SI Units
    The sensitivity is 100 times better than the competitive instruments.
  • Small Size and Low Weight
    The SM-30 is truly shirt pocket-sized instrument. With dimension 100 x 65 x 25 mm and weight 0.150 kg. SM-30 outperformed competitors 3 times.
  • Low Noise
    Thanks to sophisticated signal processing the noise induced in pick-up coil is suppressed well under resolution 1 x 10-7 SI units.
  • Deep Penetration of the Signal
    The sensor design enables to get 90 % of its signal from the first 20 mm of the rock. This feature allows more accurate readings on uneven surfaces of all rock types.
  • Simple Operation
    Auto ranging and three-button control makes the meter the easiest to operate by one hand only. Internal memory can store 250 readings.
  • Warranty
    One-year warranty is included in the price. We offer 48 hours turnaround support and repair service for any instrument sent from any location worldwide. Subsequent customer support is provided.


The SM-30 is small magnetic susceptibility meter. Thanks to the high sensitivity we can measure sediments and rocks with extremely low level of magnetic susceptibility. In addition, we can distinctly measure diamagnetic materials like limestone, quartz and also water.

The SM-30 is controlled by three push buttons. One of them serves to save up to 250 measured values into nonvolatile memory and to recall them later. The 251th value (the last measured one) is automatically displayed after SM-30 is switched on. If no button is pressed for 3 minutes, the instrument switches off automatically. The SM-30 has a beeper indicating intervals in which the information from the rock is picked-up.

The SM-30 is powered from two coin lithium batteries CR2430. If the instruments is not used too extensively, the batteries may last for years thanks to their low self-discharge.


The SM-30 has 8 kHz LC oscillator with a large size pick-up coil as a sensor. The oscillation frequency is measured when

  • the coil is put to the surface of measured rock
  • the coil is removed tens of cm away.

The SM-30 offers six measuring modes. Two of them are basic, two are compensating the linear part of the thermal drift, one is for scanning and one is for averaging

The large number of the memory registers (250) is useful especially when scanning mode is used.

Though the instrument is small, the pick-up coil is large enough in diameter to measure sufficiently high volume.


SENSITIVITY 1 x 10-7 SI units
MEASUREMENT TIME less than 5 s
CONTROLS 3 push buttons
PICK-UP COIL 50 mm in diameter
BATTERY 2 lithium CR2430
BATTERY LIFE approx. 80 hrs
DIMENSIONS 100 x 65 x 25 mm
WEIGHT 0.150 kg
STANDARD ACCESSORIES operating manual,
RS232 cable,
PC software for data transmission and for external control.