CAPACITANCE LEVEL TRANSMITTERS

 DESCRIPTION 

Flowtel FLCLT-10 are capacitance type level transmitters. The probe is based on proerties of capacitor. Vessel wall & probe
forms two electrodes. If vessel is of non conductive material, the probe will be double rod type. The distance between electrode &
surface area of electrodes remain unchanged. The variable is the depth of the material being measured which represents the
dielectric constant between two electrodes. Air & vacuum have relative dielectric constant as 1 & that of liquids, it is greater than
1. The capacitance of the capacitor the therefore depends on how much material lies between the probe & vessel wall i.e.
whether the probe is covered with or free from material. The capacitor changes with change in level of the material & provides
corresponding 4-20 mA DC continuous output.