Behaviour of a Level Differential Transmitter (LDT)

[TrustedDesire]

I know that LDTs are to measure difference in level between two liquids.
But, my question is what will be the behaviour of the LDT when it sees only one phase of the liquid?

 

[LittleInch]

Needs a bit more of an explanation, but usually differential transmitters simply register differential pressure. It's how they convert that differential pressure into level that needs the precise set up, but where, e.g. they are being used to measure the interface level between to liquids, they need to have both liquids in permanent contact with the transmitter.

If it doesn't see what it is expecting to see the transmitter will register an incorrect level or may just go out of range

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[TrustedDesire]

Thanks L.I., you're hitting the point "out of range" / "invalidity".
That is exactly what our transmitter in the electrostatic dehydrator is doing, because of increase in water-cut production recently, we've being strongly to maintain the interface of the dehydrator, and it goes to out-of-range most often.

Thanks for the point.