Pressure - How do I know when to use a diaphragm seal?

Diaphragm Seal

A diaphragm seal attaches to a pressure transmitter and uses a fill fluid to 'mechanically' transfer pressure from the process to the pressure transmitter.

A diaphragm seal is used for the following process conditions:

• High-temperature applications where the process temperature is beyond the specifications of the transmitter.
• Special process connections (such as sanitary connections, PMC connections, quick disconnect for easy cleaning between batches).
• Corrosive service.
• To isolate the process for safety reasons.
• Prevention of suspended solids from entering the transmitter capsule or impulse lines ich could become plugged.

Yokogawa EJA110E with two diaphragm seals for measuring differential pressure.

Yokogawa offers several different designs and fill fluids to tailor a solution for your application.