Due to their designs and small dimensions, theses electrodes are suitable for the control of the presence of fluid in wells (pump protection) as well as for level control in large reservoirs, barrages, etc.

A low current is sent into a so-called reference electrode. When the liquid is in contact with the reference and the level electrode (trigger point), the current passes through the conductive liquid. This short circuit is detected by a relay ES 2001 that activates a contact to trigger an alarm (remote signal).

EF 16 electrode is a single contact electrode.

EFC 16 electrode is a dual-contact electrode, the outer body is used as the
reference. No needs to provide a special ground connection. Measuring current
returns through the shield of the coaxial cable connected to the outer body.