1、Strong compatibility, can be used in conjunction with a variety of liquid level sensor 2、Strong protection, with waterproof pump idling protection and water level overflow detection output. 3、Relay dry node output, can be applied to a variety of load control 4、Control of diversification, manual or automatic mode control of water pump 5、The installation is simple and convenient, the screw can be positioned and installed, and the electric box track can also be installed. Features: Strong compatibility, can be used in conjunction with a variety of liquid level sensor Strong protection, with waterproof pump idling protection and water level overflow detection output. Relay dry node output, can be applied to a variety of load control Control of diversification, manual or automatic mode control of water pump The installation is simple and convenient, the screw can be positioned and installed, and the electric box track can also be installed. Specification: Model: LC25A01 Weight: 28g/1oz Standby current 10MA Working current 40MA Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC Size: 54*27*19mm/2.1*1.1*0.7inch Application: Home water tower automatic water supply system. Aquarium fish tank water changer system. Conductive liquid automatic control. Automatic feeding system for poultry and livestock. Farm automatic water supply system. And other occasions that require automatic water supply and water exchange. Solenoid valve water pump motor automatic control. Interface description: HIGH : Upper limit probe OUT : Output probe LOW : Lower limit probe IN+ : Power terminal 1 (regardless of positive and negative) IN- : Power terminal 2 (regardless of positive and negative) NC: Relay normally closed contact COM: Relay common contact NO: Relay normally open contact Package List: 1 x Level Controller Module Note: 1. Package does not contain probe (wire).No need to use a dedicated probe, the probe can be made using household wires 2. For safety, use an AC/DC power supply with good isolation.