Can the valve be controlled directly by a level gauge without using a PID controller?
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As long as it is necessary to prevent water from overflowing in one tank, can the output signal from a level gauge be used directly to control the valve?
This is what is usually done; more advanced systems employ level-flow cascade control.
It can be achieved by simply using a level switch; when the water level reaches the set point, the switch generates a digital signal to control the start and stop of the valve-type pump.
It can be achieved by simply using a level switch; when the water level reaches the set point, the switch generates a digital signal to control the start and stop of the valve-type pump.
It can be achieved by simply using a level switch; when the water level reaches the set point, the switch generates a digital signal to control the start and stop of the valve-type pump.
Using a level switch directly is the simplest approach.
To allow the liquid level to fluctuate within a specified range, use a level switch – it is cost-effective, simple, and reliable.
Add a 220V solenoid valve to the water inlet pipe, and install a level switch on the inner wall of the tank. With 2*1.5mm cables, the cost is very low.
Using a level switch works, but it might not be possible to control the control valve directly with the output of a transmitter, as it is not possible to set a setpoint.
The liquid level in many pools and tanks is controlled in this way; a complete set of liquid level valves costs around a hundred yuan. :lol