Shop Float, Flow, & Level Switches by Voltage
Level switches (AKA float switch) are activated by liquid levels, such as in toilet tanks, sump pumps and in processing plants. When the liquid in tank reaches a certain level, a float rises. An arm on the float throws a switch when the liquid reaches a predetermined level. The switch may actuate a valve that cuts off the flow of liquid into the tank, or it may actuate some other process such as activating a pump. Similarly a flow switch is a mechanical device which controls flows (usually of liquid, but sometimes for air or steam) by sending a trip signal to an actuator which operates a pump or valve. Level switches are a type of both pump controls and level sensors.