DC 12V Water Liquid Level Controller Sensor Module Water Level Relay Detection Sensor Pumping green.This product is designed based on the needs of agricultural irrigation, animal husbandry and factories, etc to detect water lever so as to control water level relay. Features: It Features compact size, simple wiring, low power consumption, high switching capacity, anti-interference and stable functionality. Able to automatically turn on water pump switch when water level drops low, and stop when