| Alternating current flowing through a primary coil (emitter) induces an alternating magnetic field, which in turn induces a current in the surrounding medium. The current flow in the medium on its side produces a magnetic field which induces a tension and consequently a flowing current in the secondary coil (receiver). The current which can be measured is the parameter for the conductivity of the medium. |
As the conductivity of a liquid depends significantly on the temperature, an additional detector in the sensor tip (NTC) continuously measures the temperature of the medium. The influence of the temperature is compensated by the temperature coefficient value (TC value) preset in the electronic device.
Application examples for the inductive conductivity sensor from Anderson-Negele