Features 1、High Sensitivity: The relay board has high sensitivity, will accurately detect the water level and realize automatic control of water level rise and fall. 2、Wide Applications: This relay board is widely used in various occasion requiring automatic water supply and change, such as domestic water tower, aquarium and fish tank. 3、Standard Interface: Can be directly controlled by a microcontroller, compatible for Raspberry Pi, for 8051, for AVR, for PIC, for DSP, for ARM, for MSP430, for TTL logic. 4、Support Loads: This water level controller relay supports maximum loads of 10A 250VAC, 10A 125VAC, 10A 30VDC, 10A 28VDC, 10A 12VDC. 5、Electrical Performance: The working voltage of this board is DC 12V to 15V, AC 9V to 12V, the standby current is 10mA, working current is 40mA. Specification Item Type: Water Level Controller Relay Material: PCB Application: Widely used in domestic water tower automatic water supply system, automatic control of solenoid valve water pump motor, aquarium fish tank water change system, automatic control of conductive liquid, automatic livestock feeding system, automatic water supply system of breeding farm and other occasion that need automatic water supply and change Basic Parameters: Working Voltage: DC 12-15V (AC 9-12V) Standby Current: 10MA Working Current: 40MA Package List 1 x Water Level Controller Relay