BARKSDALE CD2H-A3SS Switch

Barksdale CD2H-A3SS is a rugged housed diaphragm pressure switch in the CD2H family, designed for low‑pressure monitoring with dual SPDT contacts (dual setpoints). The A3SS variant covers a 0.3–3 psi switching range, enabling two independent thresholds to trigger separate control circuits in pneumatic or hydraulic systems. It features a 1/4" NPTF pressure connection and a stainless‑steel diaphragm for reliable service with gases or liquids, all housed in a NEMA 4X enclosure for durability in harsh environments. Wiring consists of 18‑inch, six‑conductor leads, and external adjustment is available via an adjustment screw. Electrical ratings support SPDT operation: up to 10 A at 125/250 VAC, 3 A at 480 VAC, or 0.5 A at 24 VDC, enabling direct interlock or relay use without intermediate modules. The compact, approximately 0.1‑lb package suits installations where space is at a premium, and its dual‑setpoint configuration is ideal for redundant or staged pressure control in equipment handling gases or liquids. In catalogs and distributor listings, it is referenced as CD2H-A3SS (also appearing as D2H-A3SS) as part of Barksdale’s diaphragm pressure switch lineup.