JUMO ZELOS Serie Manual De Servicio página 57

3 Description
3.2 Function
The device emits an electric field from the PEEK tip. As the medium approaches, the capacitance of the
capacitor is changed in the electric field. The capacitor is formed by the PEEK tip and the housing or the
vessel or pipe wall. The medium must have a minimum conductivity (dielectricity, permittivity [r]). The
change in the electric field is detected by the electronics of the device, processed further and passed on
as an output signal or switching signal, e.g. to a PLC.
Fig. 3-1 Schematic representation of the change in capacitance with media detection
9