Useful tips: How is an automated control system for monitoring water tower levels controlled and implemented?

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How is the automated control system for water tower level monitoring controlled and implemented? Here are two control schemes offered as a starting point. Option 1: On-off control and alarm – A float level switch is used, with an output of 4 contacts: high-high limit, high limit, low limit, and low-low limit. The high limit and low limit are used to control the level in the water tower, while the high-high limit and low-low limit are used for remote level alarm. Control process: If the on/off valve is installed in the water inlet pipe, the float level switch sends a signal to close the valve when the liquid level reaches the high limit, and it sends a signal to open the valve when the liquid level reaches the low limit ； If the on/off valve is installed in the outlet pipe, the float level switch sends a signal to close the valve when the liquid level reaches the low limit; it sends such a signal to close the valve as well when the liquid level reaches the high limit ； This article was originally published on the WeChat official account “Self-Control Academy”; follow it for more knowledge on self-control. When using a feed pump (equivalent to a on/off valve installed in the feed pipe) or an outlet pump (equivalent to a on/off valve installed in the outlet pipe) to control the liquid level, the control process is similar to that of using on/off valves; generally, on/off valves are installed in the feed pipe. If the high and low limit controls fail, remote level alarms at the high-high or low-low limits will be triggered, ensuring the safe operation of the water tower. Option 2: Continuous control and alarm – A float control valve and a float level switch are used; the float control valve enables continuous control of the water tower’s level, thereby maintaining a constant level in it ； The float level switch provides 2 output contacts, one for the high-level limit and another for the low-level limit, which are used for remote level alarm. Control process ； When the liquid level in the water tower rises or falls, the float valve operates continuously, allowing the level to be maintained at a certain level; this enables continuous automatic control of the water tower’s liquid level. If the control valve of the float valve fails, the float level switch sends an alarm signal to enable remote monitoring. Premise: The premise for adopting the solution of using a float control valve and a float level switch for alarm is that the water supply to the water tower must come from the pipeline network. Advantages: Since the float control valve is self-acting, it saves energy. Note: The installation location of the float level switch should be as far away as possible from the water tower’s inlet. Do anyone have other suggestions? Feel free to share your ideas.