Longuest electrode is use as reference, it means that, a head with 5 electrodes may detect 4 levels. Electrical contact is done when reference and another electrode are on contact with the fluid, it is transformed to ON/OFF signal by an ES 2001 relay (see doc 530).

Designed for control and regulation of fluid levels in open tank by electrodes, for instance acid storage tanks, barrage, waste water treatment plant, etc. and detection of fluid in a pipe, leakage etc. Construction materials are convenient for highly aggressive fluids such as hydrofluoric acid.

With Hastelloy G30 electrode terminals and PVC or PVDF stems, the STS probe is useful for most acids. Others terminal materials, SS316 or Tantalum and other material stems such as PTFE or PPH are available on request.