All-metal inertial gas sampling (IGS) filters feature a cross-flow design that keeps most particles in the gas stream, greatly reducing obstruction of the filter element. IGS filters reportedly provide long-term and, in many cases, permanent filtration. They withstand temperatures to 1,450°F in oxidizing atmospheres and up to 1,700°F in reducing or neutral atmospheres, depending on the material of construction. They come in a variety of high-strength alloys including 316LSS, nickel, Hastelloy, and Inconel. The porous metal filters can serve in highly corrosive environments, as well as high-pressure applications with differential pressures in excess of 1,000 psid.
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