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    How to use a DP (differential pressure) transmitter for level measurement?

    Question: How to use a DP (differential pressure) transmitter for level measurement?

    Answer:

    A differential pressure transmitter gives a linear output for the differential pressure measured across its HP and LP chambers.

    Connect the transmitter’s HP leg to the bottom of the tank and its LP leg to the top of the tank. The transmitter will read the liquid level accurately irrespective of the change in process pressure above the liquid surface.

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