I am trying to find a level sensor/method for a chocolate day tank to control the automatic replenishing of it as the chocolate is consumed by the process. The control does not have to be precise, the level could vary over possibly 12" and not affect the process. The fill valve that will be used will be just on/off. At the bare minimum I need to know when the level drops below a certain height, but having the ability to know if their is an overfill or empty situation would be handy to allow an alert to be sent. The cylindrical, angled bottom day tank (100 gallons) will have an anchor style scraped agitator in it, so inserting into the side at different levels doesn't sound like an option. The vibrating tuning fork method has been suggested to me, but that will only indicate if the level drops below a certain level. I am also concerned about that sensor's behavior when chocolate adheres to it and then hardens. Any advise would be helpfull. After reviewing some of the other posts I'm leaning towards one of the radar methods.
thanks in advance for any help
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