The 140 family of diaphragm-type differential pressure indicating switches is CSA and UL certified. Available with a pressure rating to 3000 psi. Variety of elastomers suit every media, and differential pressure ranges from 0-20 in. H2O to 0-100 psid. Enclosed in an aluminum NEMA 4X housing with 1/2-in. FNPT access and may contain one or two independently adjustable SPST pr SPDT switches.