| 摘要 |
Two magnetic circuits are provided with two gaps penetrated normally by similar magnetic fields and having similar zones of inhomogeneities as effective on two test bodies which are interconnected rigidly but in a manner permitting deflection, rotational or linear. The gaps are surrounded by gas, and one of the test bodies forms a combined system with an additional material as far as paramagnetically or diamagnetically produced deflective forces for that body is concerned. The gas may be a reference gas with the additional material being a liquid sample, or the gas may be a test gas to be investigated while the additional material is a reference gas, encapsuled in that one body; the other body is either hollow with access for the test gas to its interior or solid, but smaller. The interconnected bodies experience different deflections in the two gaps resulting in a deflection which is monitored and converted into an amplified control current which, in turn, is fed back to unbalance the magnetic fields in the gaps for returning the bodies to the equilibrium position. The current needed for unbalancing the fields is an indication of magnetic susceptibility of the sample.
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