Barksdale d2t-h18ss Pressure or Vacuum Actuated Switch

The Barksdale D2T-H18SS is a housed diaphragm pressure switch with dual, SPDT setpoints that can be triggered by either positive pressure or vacuum, making it a versatile control device for industrial systems. It operates over a 0.4 to 18 psi measuring range and is designed to sense vacuum as well as pressure, with guidance that higher vacuum service should be discussed with the factory for specific applications. The unit ships with a terminal-block configuration for easy wiring and uses a 1/4" NPT female pressure connection for straightforward installation into standard lines. The enclosure is built to withstand demanding environments and carries a NEMA 4-rated housing, suitable for indoor use and protected outdoor or damp locations. Available configurations support typical industrial voltages, including 125/250 VAC and up to 480 VAC, depending on the exact wiring and contact arrangement. The D2T-H18SS is engineered for durability in process, pneumatic, and HVAC-related applications where two setpoints are required to monitor and respond to rising or falling pressures (and corresponding vacuum conditions), enabling reliable control of pumps, fans, valves, and other equipment that require precise turn-on/turn-off thresholds. With its compact, terminal-block design and robust diaphragm sensing element, this switch provides repeatable actuation and straightforward integration into control circuits while maintaining compatibility with standard 1/4" NPT piping and common electrical interfaces.