GF-Instruments - Model SM-20 -Magnetic Susceptibility Meter
The SM-20 magnetic susceptibility meter is very useful tool for a number of geological and geophysical applications where the unique sensitivity of 10-6 SI units together with its small, shirt-pocket size and low weight are appreciated. The SM-20 is designed especially for field geologists and for fast laboratory assays for analysis and classification of rock types or drill core samples. Those measurements allow basic differentiation of rocks (diamagnetic, paramagnetic and ferromagnetic) and their precise susceptibility quantification.
The original sensor and the new method of signal processing guarantee advanced features of this kappameter.
The SM-20 is simply operated using two buttons. More comfortable operating including point labels, comments and data storage for next processing is available using PC handling.
The Li cells supply and the automatic power-off function provides a long working time without battery change.
Standard accessories:
- Leather case
- Operating manual
- PC connecting RS-232C cable
- PC software for external control and data storage
Sensitivity:
- 1x10-6 SI units
Measuring range:
- 0.000 to 999 x 10-3 SI units
- auto-range
Measuring time:
- 1 s per sample
Measuring modes:
- simple
- driftless
- continuous (rough scanning)
Sensor:
- air-cored coil with diameter of 50 mm getting 90% of measuring signal from the first 20 mm of the rock
Operating frequency:
- 10 kHz
Weight:
- 127 g
Dimensions:
- 100 x 65 x 25 mm
PC Interface:
- RS-232C
Display:
- 3 1/2 character LCD
Data memory:
- internal storage of 120 measurements
- advanced data management under PC control
Battery:
- 2 Lithium 3 V cells CR 2032 (life of 100 hours typically)
Operating temperature range:
- -10 to +60°C
Ambient operating conditions:
- air humidity to 100%
- weatherproof