Measures and reads quantities of liquids, with output for alerting when set limit reached, or turn off pump or close valve. When it is connected to a flowmeter it displays the flow rate in litres/minute in real time as well as the total amount of litres. It is possible to set the amount desired so that you will be alerted when this value is reached. The 10A output signal can generate light or sound pulses, drive a 12VDC gearmotor or a solenoid valve to cut the power to a pump.