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| MFK1 KAPPABRIDGES | Back |
These are the world's most sensitive commercially available laboratory instruments for measuring anisotropy of magnetic susceptibility and bulk magnetic susceptibility in weak variable magnetic fields (field range from 2 A/m to 700 A/m, peak values). Besides the in-phase bulk susceptibility, relative changes of the phase angle can be measured. The MFK1-FA and MFK1-FB models are capable to measure, besides at the basic frequency of 976 Hz, also at two additional frequencies of 3904 Hz and 15616 Hz.
The MFK1-FA and MFK1-A versions measure the AMS of a slowly spinning specimen. One has to adjust the specimen only into three perpendicular positions. The measurement is rapid (about 2 minutes per specimen) and precise, profiting from many susceptibility determinations in each plane perpendicular to the axis of specimen rotation. Special software combines the measurements in three perpendicular planes plus one bulk value to create a complete susceptibility tensor. The errors in determination of this tensor are estimated using special method based on principles from multivariate statistics.
The MFK1-FB and MFK1-B models measures the AMS of an immobile specimen. Susceptibility is measured in 15 different positions using a special holder with sample positions that correspond to the rotatable measuring design. The positions are changed manually and, using special software, the susceptibility tensor is calculated including the statistical errors in its determination.
More information on MFK1 Kappabridges
| CS-3 FURNACE APPARATUS | Back |
The instrument measures the temperature variation of magnetic susceptibility at temperatures ranging from room temperature up to 700 degrees Centigrade, in cooperation with the MFK1-FA, MFK1-A, KLY-4S or KLY-3S Kappabridges. The apparatus comprises a non-magnetic furnace and an electronic control unit. The specimen, about 0.25 cm3 in volume, is heated electrically by a platinum element and the temperature is measured by a special platinum temperature sensor. The quasi-continuous measurement process is fully automated, being controlled by a personal computer. The curve of temperature variation against susceptibility consists of between 500 to 700 points. In weakly magnetic specimens the curve can be resolved into a paramagnetic hyperbola and complex "ferro"magnetic response curve.
Download KLY-4 / KLY-4S / CS-3 / CS-L User's Guide
Download KLY-3 / KLY-3S / CS-3 / CS-L User's Guide
| CS-L LOW TEMPERATURE CRYOSTAT APPARATUS | Back |
This device measures temperature variation of magnetic susceptibility at low temperatures ranging from liquid nitrogen temperature to room temperature in cooperation with the MFK1-FA, MFK1-A, KLY-4S or KLY-3S Spinner Kappabridge and CS-3 Furnace Apparatus.
Download KLY-4 / KLY-4S / CS-3 / CS-L User's Guide
Download KLY-3 / KLY-3S / CS-3 / CS-L User's Guide
| JR-6A / JR-6 DUAL SPEED SPINNER MAGNETOMETERS | Back |
This is the most sensitive and accurate instrument for measurement of remanent magnetization of rocks based on classical (non-quantum, non-cryogenic) principles. Its outstanding sensitivity enables even rocks with very weak remanent magnetization to be measured, for example, various sedimentary rocks including limestones and quartzites.
Two rotation speeds are available, the higher one (87.7 rps) enabling the maximum sensitivity to be reached, and the lower one (16.7 rps) enabling the soft specimen to be measured.
The JR-6A (automated) version is destined for rapid and accurate measurement of remanent magnetization. The specimen is manually only inserted into the specimen holder and the instrument automatically changes the sample orientations to obtain the remanence vector.
The JR-6 version is the non-automated version of the instrument with the same sensitivity and accuracy. It differs only in that the sample's orientation must be changed by hand as with all other magnetometers. According to the accuracy required, one can measure the specimen in two, four or six orientations.
More information on JR-6A/JR-6
| LDA-3A AF DEMAGNETIZER | Back |
This instrument demagnetizes a tumbling specimen, or a static specimen in 3 perpendicular directions, by application of alternating magnetic field. The demagnetization process is microprocessor-controlled and automated. One selects demagnetization parameters (peak demagnetizing alternating field, dwell time in this field, rates in increasing and decreasing the field). The sample is fixed into the specimen holder that is inserted into the demagnetizing coil. The instrument tumbles the specimen while increasing the alternating field to its peak value. The initial growth rate is low and then higher (parabolic). After holding the peak value for the dwell time the alternating field decreases according to pre-set mode, and tumbling ceases. Static specimen is demagnetized in the same way but without moving, the three perpendicular positions are set automatically by the instrument
The common electrical grid provides the power source for this instrument. Thus, it is filtered electronically to attenuate higher harmonic components that may produce unwanted parasitic anhysteretic magnetizations.
| AMU-1A ANHYSTERETIC MAGNETIZER | Back |
The AMU-1A Anhysteretic Magnetizer is an option to the LDA-3 AF demagnetizer. This equipment permits the deliberate, controlled anhysteretic magnetization of a specimen. The AMU-1A equipment produces a weak direct magnetic bias field which is, thanks to specially constructed electronic filters, superimposed upon the stronger alternating magnetic field generated in the LDA-3A demagnetizer. Both fields are coaxial and affect the specimen simultaneously.
This equipment is useful in rock magnetism and environmental studies. A significant use is to determine the anisotropy of remanence, in conjunction with any instrument for measuring remanent magnetization (for example the JR-6A Spinner Magnetometer produced by AGICO).
| KT-6 FIELD KAPPAMETER | Back |
This hand-held instrument allows rapid and sensitive measurement of magnetic susceptibility of rock exposures and hand samples or for preliminary observations of susceptibility of drill core.
The KT-6 (manufactred by SatisGeo) is operated very simply. It stores 120 susceptibility values in its memory and is ideal in geological mapping, petrological research, etc., where bulk susceptibility data are sufficient. Connection to a PC through serial channel RS-232 is possible.