Fitzer instruments [india] offers a device for level sensing for continuous indication. This unit is applicable for non-foaming conductive liquids with low/medium viscosity like water, water bound solutions as well as non-conductive liquids like minerals oils, etc. These level transmitters are based on the principle of variation of capacitance values caused by level changes around the electrode. The electrode forms a conductor with the container wall and the product. The capacitance value of which changes proportional to the level. The oscillator transforms capacitance change into a dc signal. The evaluation instrument converts dc signal to proportional 4 - 20 ma.
