Industrial 674DEM1 Differential Pressure Switch

The CCS Dual-Snap 674DEM1 Differential Pressure Switch is a factory‑preset, explosion‑proof differential pressure switch designed for hazardous‑area service. Built with a rugged aluminum body and 1/8‑27 NPT pressure ports, it uses a Buna‑N diaphragm and a hermetically sealed electrical assembly that is UL/CSA listed and suitable for NEMA 4, 7, 9, 13 with IP66 protection. The 674DEM1 variant is the DPDT (dual‑pole) version in the 674DE family and features CCS’s Dual‑Snap Belleville disc spring sensing technology for repeatable set points in a differential range of about 0.048–0.552 MPa (roughly 7–80 psi). Operation temperatures span -40°F to 186°F (-40°C to 86°C), and the unit is available with various wetted materials and electrical ratings to meet media compatibility. Certifications include CE, CCC, CRN, and UL/CSA listing, reflecting its use in demanding industrial environments where rugged, hermetically sealed electronics are required.