An isolating diaphragm gauge is used to isolate what from the process medium?

An isolating diaphragm gauge is used to isolate what from the process medium?

• A. To measure temperature
• B. To isolate corrosive media or clogging process medium
• C. To filter process liquids
• D. To monitor flow rate

Answer: (B)

An isolating diaphragm gauge works by using a diaphragm seal to keep the process fluid away from the pressure-sensing part of the instrument. The diaphragm forms a barrier between the process medium and the gauge’s sensing element, with fill fluid in a capillary transmitting the pressure. This protects the instrument when the process fluid is corrosive, dirty, viscous, or prone to clogging or crystallizing, and it helps maintain accurate readings by preventing contact with harsh or clog-prone media. It isn’t about measuring temperature, filtering liquids, or monitoring flow, which is why isolating corrosive or clogging process media from the gauge is the correct concept.

An isolating diaphragm gauge works by using a diaphragm seal to keep the process fluid away from the pressure-sensing part of the instrument. The diaphragm forms a barrier between the process medium and the gauge’s sensing element, with fill fluid in a capillary transmitting the pressure. This protects the instrument when the process fluid is corrosive, dirty, viscous, or prone to clogging or crystallizing, and it helps maintain accurate readings by preventing contact with harsh or clog-prone media. It isn’t about measuring temperature, filtering liquids, or monitoring flow, which is why isolating corrosive or clogging process media from the gauge is the correct concept.