Feature: 1. EASY TO USE: Water level control relay switch module is simple to operate, easy to connect by reference to the wiring diagram, possess stable performance, and can control the water level well 2. AUTOMATIC START: When the water level is lower than the B probe, the water level control module automatically pump water. Stop pumping when the water level get to probe C 3. APPLICATION SCENARIO: Can be used for automatic water supply system of water supply tower; Aquarium water supply system; Automatic control of conductive fluid; Automatic water supply system for livestock and poultry; Automatic water supply and water exchange where water is needed, such as farm automatic water supply system. Solenoid valve, water pump, automatic motor control 4. WIDE RANGE OF APPLICATIONS: The water level control switch module can be developed according to the actual water consumption of the household factory mining industry, can automatically pump water when the water level is low through water level sensing, and automatically stop pumping when the water level get to the set height 5. COMPACT AND PRACTICAL: Automatic water level control switch module has a small size, suitable for a variety of products. Converter voltage for 9‑12V, can be directly replaced by 12V DC power supply, the maximum current is 10A Specification: Item Type: Water Level Control Relay Switch Module Material: PCB Converter: 9-12V(can be used directly replaced with 12V DC power supply) Maximum Current: 10A. Package List: 1 x Water Level Control Relay Switch Module Note: 1. There is no probe(cable) in the package, no need to use a specific probe, the probe can be made of household cable.2. For safety, use a well insulated AC DC power supply.3. For water pump exceeding 2000W, a contactor should be added.