The switch may actuate a pump, indicator, alarm or other device. It can be easily converted from normally open to normally closed by reversing the float. A float switch is a device used to detect the liquid inside a tank. Note: Because the current that the switch can be realized is much small (0.5A), you must use a relay or contactor when connected by a load, relays and contactors are not included here., Weight: 0.10361726314 Pounds, Manufacturer: Rtxbvg