Electronic flowmeter for automatic closing valve
In fact, you can consider the float valve, like the toilet inside the device, such as liquid fill soon, the valve automatically closed
If you need a meter and a batch control meter outflow reached 4.5 liters when the batch controller can switch quantity output control valve with flow meter, but with a smaller diameter unless slower filling or not this system is of high accuracy. If the density of the liquid is stable, it is recommended that you use the filling scale. The products on the market are better in accuracy and reliability.
Can purchase flow controller or use a flow meter + solenoid valve, when the flow reaches the requirements, the solenoid valve power
