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About IIG Observatory Instruments and Facilities

Anisotropy of magnetic susceptibility meter (KLY-2 Kappabridge)

Instrument Details
Name: Kappabridge KLY-2
Made: Geofyzica n. p. Brno, Czechoslovakia

Range : 11 ranges (100, 200, 400, 1000,…200000 X 10 -6 (SI) )
Operating Frequency : 920 Hz
Magnetic field intensity : 300 A/m
Accuracy : ± 0.1 %
Sensitivity : 4 x 10 -8
Power Requirements : 220 V
Specimen volume : 10 cm 3

The Kappabridge KLY-2 is used for measuring magnetic susceptibility of rock specimens and its anisotropy. Its operation is based on measurement of inductivity changes in coil due to rock specimens. In principle the instrument represents a precision semi-automatic auto-balance inductivity bridge. It is equipped with automatic zeroing and automatic compensation of the thermal drift of the bridge unbalance. The KLY-2 bridge has high accuracy, fast measuring rate and an outstanding sensitivity that makes it possible to measure even rocks with very weak magnetic properties. This instrument can be attached with high and low temperature variations of magnetic susceptibility.

To determine stress and strain ellipsoidal pattern, foliation plane and lineation direction to trace deformation path and tectonic movement. To measure preferred orientation fabrics of the magnetic minerals in the sedimentary rocks to reconstruct palaeo-flow directions.

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