Sensor for measuring the electrical conductivity of a fluid medium
The invention relates to an inductively operating sensor ( 1 ) for measuring the electrical conductivity of a fluid medium ( 2 ), having an excitation coil ( 3 ) to which an input signal is fed and a receiver coil ( 4 ) coupled to the excitation coil ( 3 ) via the fluid medium ( 2 ), the receiver co...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention relates to an inductively operating sensor (
1
) for measuring the electrical conductivity of a fluid medium (
2
), having an excitation coil (
3
) to which an input signal is fed and a receiver coil (
4
) coupled to the excitation coil (
3
) via the fluid medium (
2
), the receiver coil (
4
) providing an output signal (I
ind
) which is a measurement of the conductivity of the fluid medium (
2
). The sensor (
1
) has means (
5
) for measuring a variable signal at the input of the excitation coil (
3
) for timely detection of damage to the windings of the excitation coil (
3
), the receiver coil (
4
), and/or to a power cable network for the sensor (
1
). The excitation coil (
3
) of the sensor is preferably fed by an input voltage (U
Err
) and the means (
5
) for measuring the variable signal preferably measure the input current (I
Err
) at the input of the excitation coil (
3
). |
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