Abstract: The invention relates to a measuring device having a transmitter (1, 2, 3) for transmitting a measurement signal, a receiver (4) for receiving a response to the transmitted measurement signal, and a signal processing device (7, 8, 9; 18) for determining a measurement result from the response, the transmitter and/or the receiver having a coil (3; 4; 16), the measuring device having a calibration device for reducing an interference influence on the measurement result, characterized in that the calibration device is configured such that a current pulse can be introduced into the coil (3; 4; 16) from a current source (DC) and the signal processing device (7, 8, 9; 18) can perform a measurement value correction using the calibration signal generated by the current pulse and can determine a measurement result from the response and the measurement value correction. The invention further relates to a measuring method.

Abstract: The invention relates to a magnetic flow sensor (1, 21, 51) comprising a) a loop-shaped magnetic field conductor comprising a point (2, 22, 32, 52) which expands to form a bar or a film (3, 23, 52), a loop-shaped part (3a, 23a, 53a) and at least one part (4, 24, 54?, 54?) which guides back the magnetic field lines of the probe, b) SQUID (7, 27, 57), c) and a diaphragm (5, 25, 35, 55) comprising a hole (6, 26, 36, 56), whereby the part (4, 24, 54?, 54?) which guides the magnetic field lines of the probe back to the loop-shaped magnetic field conductor is connected to the diaphragm (5, 25, 35, 55).

Abstract: The invention relates to a magnetic flow sensor (1, 21, 51) comprising a) a loop-shaped magnetic field conductor comprising a point (2, 22, 32, 52) which expands to form a bar or a film (3, 23, 52), a loop-shaped part (3a, 23a, 53a) and at least one part (4, 24, 54?, 54?) which guides back the magnetic field lines of the probe, b) SQUID (7, 27, 57), c) and a diaphragm (5, 25, 35, 55) comprising a hole (6, 26, 36, 56), whereby the part (4, 24, 54?, 54?) which guides the magnetic field lines of the probe back to the loop-shaped magnetic field conductor is connected to the diaphragm (5, 25, 35, 55).

Abstract: An electrode, in the form of a spike, for insertion into a sample, has a large-area jacket adapted for applying an excitation current to the sample and a small-area tip electrically decoupled from the jacket, at which a potential measurement is made.

Abstract: A method and apparatus for the rapid tomographic measurement of conductivity distribution in a sample in which current excitations or voltage excitation is applied to the sample via electrodes or the like and potential differences or magnetic field strengths association with those excitation fields are measured and analyzed, e.g. by a Fourier analysis.

Abstract: An electrode, in the form of a spike, for insertion into a sample, has a large-area jacket adapted for applying an excitation current to the sample and a small-area tip electrically decoupled from the jacket, at which a potential measurement is made.

Abstract: A method and apparatus for the rapid tomographic measurement of conductivity distribution in a sample in which current excitations or voltage excitation is applied to the sample via electrodes or the like and potential differences or magnetic field strengths association with those excitation fields are measured and analyzed, e.g. by a Fourier analysis.

Abstract: In order to measure magnetic characteristics of a sample, the latter is positioned above the SQUID so that both the SQUID and the sample are supported in a vessel in a gaseous nitrogen space above a liquid nitrogen coolant so that the measurement can take place at ambient pressure and in a nitrogen atmosphere.

Abstract: In order to measure magnetic characteristics of a sample, the latter is positioned above the SQUID so that both the SQUID and the sample are supported in a vessel in a gaseous nitrogen space above a liquid nitrogen coolant so that the measurement can take place at ambient pressure and in a nitrogen atmosphere.