Conductivity level switches are used for checking liquid level of tanks and boilers. As it does not have any movable part, it can be used in the critical ambient and in the liquids with solid particle,
low density and high viscosity.
When liquid leved comes to the level of isolated electrode, current passage starts or stops between electrode andliquid. Strengthened this AC current may be assesed with a relay cirruit.
lt is an economic and safe solution for air pressure tank applications, water level control of steam boilers and conductive tanks.