Unique Bargains Fish Tank Blue Plastic SPST Water Level Sensor Float Switch ZP5210-P

A float switch is a device used to sense the level of liquid within a tank. The switch may actuate a pump an indicator an alarm or other device. It can be easily converted from normally open to normally close by invertin the float. Note: because the current that the switch can carry is much little(0.5A) you must use a relay or contactor when it is connected by a load relay and contactor are not included here.