Recommended Where The Fluid Is Highly Corrosive, Contaminated, Viscose Or Liable To Crystallize Inside The Measuring System. Diaphragm Sealed Gauge Are The Separation Stage Between Medium And Gauge. These Diaphragm Sealed Gauge Above The Diaphragm Seal Is Filled With Suitable Oil Which Transmit The Pressure Acting On The Diaphragm To The Bourdon Tube. The Diaphragm Is Welded To The Upper Part Of The Sealed Unit Without Removing The Gauge To Clean The Diaphragm.