Application This water pump float switch is suitable for controlling the work of the pump, float switch according to the water liquid level at start and stop, can also be installed on the submersible pump to control or protect the motor operation. High quality material The automatic control water level controller made of high quality polypropylene, which has good airtightness, can prevent leakage reliability, you can use it. Easy to use This float start switch controller has the principle of gravity buoyancy which can be adjusted automatically, easy to use, easy to install. As long as you follow the right approach, your productivity will be significantly increased. Scope of application: The water level switch can be used in swimming pools, submersible pumps, sewage sump pumps, barrels, tanks, and other containers containing water, oil, acid, and alkali in households, factories, and mines. Note: With a 3m cable, this level switch is directly used for motors below 1500W, voltage 12V/24V/48V/110V-120V/60Hz, 220V-240V/50Hz, 380V/50Hz. If the motor is larger than 1500W, it is recommended to use AC power (the float switch is not explosion-proof).