Level control for underground storage tanks
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How is the liquid level control of buried storage tanks managed? How to draw it in a PID diagram?
LIA (H, L high/low alarm) + LG. Check whether it is interlocked with the pump.
LG: Isn’t it generally supposed to be used for reading directly on the storage tank?
For ordinary storage tanks, the liquid level remote transmission is set up together with the on-site display to facilitate on-site observation.
Consider using a submersible pump for transportation or conveying by pressure difference, and add a liquid level indicator
A radar or ultrasonic level gauge will suffice
Ultrasonic level gauges can be used to display and control the liquid level, and they are presented in the same manner as PID controllers and other secondary instruments.
For level gauges that combine radar and magnetic flip switches, it depends on the properties of the medium