Diaphragm seal
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![Environmental scanning electron microscope image of ozone cracks in NBR diaphragm seal formed at sharp corners in seal](/Images/godic/202501/08/Ozonecr23916.jpg")
A diaphragm seal is a flexible membrane that seals and isolates an enclosure. The flexible nature of this seal allows pressure effects to cross the barrier but not the material being contained.
Common uses for diaphragm seals are to protect pressure sensors from the fluid whose pressure is being measured.