Difference between pressure transmitters and diaphragm-sealed pressure transmitters
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I would like to ask everyone, what is the difference between pressure transmitters and diaphragm-sealed pressure transmitters? In what occasions are they used?
The sealing diaphragm is used to prevent the medium in the pipeline from entering directly into the pressure sensor component of the differential pressure transmitter; it is connected to the transmitter via a capillary filled with fluid. Yokogawa EJA438w. This post was last edited by “I Love No. 7” on April 23, 2009, at 09:09
Is it the case that in situations with significant corrosion, a sealed diaphragm type is used?
For special media with high viscosity or that are prone to crystallization, diaphragm differential pressure transmitters can be considered
There should be one, or perhaps it’s to prevent the medium from entering the conduit and causing significant errors in the transmitter.
Diaphragm-sealed pressure transmitters are used when the medium is corrosive or may cause corrosion to the internal components of the transmitter (for example, ammonia can corrode the copper inside the transmitter).