Wetted Materials Options for Pressure Sensors

• Pressure sensors can come in a wide range of wetted materials, which refers to the part of the sensor that comes in contact with the media being measured.
• The choice in wetted material can be critical for preventing process disruptions and inaccurate pressure measurements.
• We offer many types of wetted materials for our pressure transducers and our engineering team can help you make the best choice for your application.

One of the most important steps when specifying the most appropriate pressure sensor for your application is selecting the wetted materials of the process connection (pressure port). Wetted material is another term for the type of metal that will be in contact with the media in your application. No single metal can economically handle all of the medias in different processes and industries. We offer a wide range of wetted materials to ensure the most adequate compatibility in your application. Below is a listing of the most common wetted materials we offer for our pressure sensors, from Core Sensors, and the typical use.

Common Wetted Materials Options for Industrial Pressure Sensors

17-4PH Stainless Steel (UNS S17400)

This is a high strength, corrosion resistant martensitic stainless steel. It is also referred to as Type 630 steel. It is ideal for hydraulics and high cyclic applications. However, we do not recommend 17-4PH for hydrogen service, cryogenics, sea water, or high temperature operation.

316L Stainless Steel (UNS S31603)

316L stainless steel is a low carbon version of 316 stainless steel. It is ideal for applications requiring corrosion resistance. For example, water, oils, lubricants, natural gas, mild acids, and in some cases for hydrogen service*. However, we do not recommend this stainless steel is for sea water, high levels of chlorine, or hydrogen sulfides.

*Special considerations should be made when specifying 316L SS for hydrogen service. Please visit our Hydrogen application page to learn more: https://psctexas.com/hydrogen-pressure-measurement/.

Inconel 718 (UNS N07718)

Inconel 718 is a super nickel-chromium alloy that offers high strength. It is ideal for oil and gas, high temperature operations, and sea water applications. Additionally, Inconel 718 offers resistance against chlorides. For example, oil and gas operations, stress corrosion, and sulfide stress cracking. However, we do not recommend Inoconel 718 for use in pure, high pressure hydrogen applications.

Hastelloy C276 (UNS N10276)

Hastelloy C276 is a special alloy from Haynes International, Inc. This material is a super nickel-molybdenum-chromium alloy that offers high corrosion resistance. For example, in oil and gas, sea water, chemical processing, and high temperature applications. Hastelloy C276 is ideal for use with high H2S content processes, wet chloride gas, hypochlorite, and many other chemicals found in chemical process applications. However, we do not recommend this alloy for pure, high pressure hydrogen applications.

Titanium BT9 (Grade 12)

Titanium BT9 alloy is ideal for high strength, high temperature applications. It is excellent for downhole and aircraft test stand engine exhaust gas pressure measurements. Titanium BT9 is the material in all of our high temperature sensors.

This is a broad list of materials from Core Sensors and some common applications to consider. We highly recommend the customer verifies the compatibility of the material with a material expert before choosing a wetted material.