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Diaphragm / sensor material

The selection of diaphragm material used on a pressure sensor, depends on the application where the sensor will be used. We must first ask the question, does the sensor come in contact with a pure material, or a blend of materials? Then we would consider the properties of these materials, based on the classification of each polymer component.

Diaphragm seals are often made from materials with different corrosion properties such as Stainless Steel 304, Stainless Steel 316 and Stainless Steel 316L. Some other materials are:

15-5 PH Stainless steel with Dymax ® coating – Provides durability with abrasion resistance, standard on most sensor models.

Hastelloy – Provides corrosion resistance, not recommended for prolonged use in high temperatures.

Inconel 718 – Provides abrasion and corrosion resistance, recommended for use in temperatures up to 750 degrees F or higher.

Dymax ® – Durable,  proprietary surface coating, abrasion resistance.

Borofuse – Best abrasion resistance coating available, can only be used on Inconel

Titanium Nitride – Abrasion and adhesion resistance, can be used on most diaphragm materials.

Titanium Aluminum Nitride – Enhanced abrasion and adhesion resistance, standard on Dynisco Echo sensors (inconel diaphragm material)

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