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Reasons for Choosing a Diaphragm Seal for Pressure Applications

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In many pressure applications, it is necessary to isolate the sensing element from the material being sensed.

The components used for the sensing element can be damaged or in other ways rendered useless from corrosive fl uids in chemical applications, debris that clogs a sensor’s port in wastewater applications or when a process connection is changed from threaded to sanitary in a dairy plant. A diaphragm seal, which is a barrier between a pressure sensor and the media it is measuring, can help protect the sensing element in these and other applications.

Measuring pressure in any application begins by using a pressure sensor that has a port that is plumbed into a pressurized line or tank. The fl uid in the line or tank exerts a force against the sensor’s measuring element. The element is tied to electronics that convert the measured pressure to an electrical signal, such as an analog 4-20 mA output.

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