Processing Magazine

Easy-to-Install Explosion-Proof Pressure Switches

July 15, 2010
The pressure switches are field-mounted instruments with an ATEX flame proof, UL and CSA explosion-proof rating. The pressure sensing assembly is similar to a conventional SOR-type pressure switch, except the switching element assembly is hermetically sealed and the product is in an explosion-proof stainless steel or aluminum housing. The diaphragm o-ring provides initial protection backed by a hermetically sealed snap switch for a second line of protection – dual seal standard ANSI/ISA -12.27.01-2003. A simple, fast installation without special tools and long service life make it a very cost-effective product.