• HIGH SENSITIVITY 1 x 10^-6 SI UNITS
  The sensitivity is 10 times better than the competitive instruments.

• SMALL SIZE AND LOW WEIGHT
  The SM-20 is truly shirt pocket-sized instrument. With dimension 100 x 65 x 25 mm and weight 0.128 kg. SM-20 outperformes competitors 3 times.

• LOW NOISE
  Thanks to sophisticated signal processingg the noise induced in pick-up coil is suppresed well under resolution 1 x 10^-6 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
  Autoranging and two-button control makes the meter the easiest to operate by one hand only. Internal memory can store 29 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-20 is small magnetic susceptibility meter. Thanks to the high sensitivity we can measure sediments and rocks with extremaly low level of magnetic susceptibility. In addition, we can distinctly measure diamagnetic materials like limestone, quartz and also water.

The SM-20 is controlled by two tactile-feedback push buttons. One of them serves to save up to 29 measured values into nonvolatile memory and to recall them later. The 30-th value (the last measured one) is automatically displayed after SM-20 is switched on. If no button is pressed for 3 minutes, the instrument switches off automatically. The SM-20 has a beeper indicating intervals in which the information from the rock is picked-up.

The SM-20 is powered from two coin lithium bateries CR2430. If the intruments is not used too extensively, the batteries may last for years thanks to their low self-discharge.

The SM-20 has 11 kHz LC oscilator with a large size pick-up coil as a sensor. The oscilation frequency is mesured when

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

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

SENSITIVITY	1 x 10-6 SI units
OPERATING FREQUENCY	11 kHz
MEASUREMENT TIME	less than 5 s
DIGIGTAL DISPLAY	4 digits LCD
CONTROLS	2 push buttons
PICK-UP COIL	50 mm in diameter
OPERATING TEMPERATURE	-10°C to 50°C
BATTERY	2 lithium CR2430
BATTERY LIFE	approx. 80 hrs
DIMENSIONS	100 x 65 x 25 mm
WEIGHT	0.127 kg
PC INTERFACE	RS232C
STANDARD ACCESSORIES	operating manual, RS232 cable, PC software for data transmition and for external control.

Copyright © 2002 ZHinstruments. All rights reserved.