Barksdale DPD1T-H18SS Dialmatic Pressure Switch

The BARKSDALE DPD1T-H18SS is a housed diaphragm differential pressure switch with a single setpoint designed to monitor pressure differences in fluid or gas lines and actuate a connected circuit when the setpoint is reached. It uses a 1/8" NPT process connection (internal thread) and employs a mechanical sensing principle within a rugged enclosure rated IP65 for industrial environments. The H18SS designation identifies the pressure-range code, with an adjustable measuring range of 0.05 to 1.2 bar (approximately 0.72 to 17.4 psi), making it suitable for monitoring small differential pressures across components such as filters, ducts, or valves. The device provides a single SPST switching output (one contact), enabling it to drive control devices, alarms, or shutdowns. Electrical ratings for this family typically include up to 10 A at 125/250 VAC and 3 A at 480 VAC, depending on the limit-switch configuration, aligning with Barksdale’s series specifications. Engineered for reliability, this diaphragm-based switch serves process-control applications where a precise, repeatable differential pressure must trigger an action—such as fan or damper control, system alarm, or safety interlock—delivering predictable performance in demanding environments.