BARKSDALE D2H-B18 Pressure Actuated Switch

BARKSDALE D2H-B18 Pressure Actuated Switch is a diaphragm-type switch in the D2H family that triggers electrical contacts when system pressure reaches its set point. The model is documented as D2H-B18 with a 0.4 to 18 psi actuation range, and it appears in distributor catalogs as a D2H-B18 variant designed for low-pressure monitoring in pneumatic and related systems. Some listings note this specific model as discontinued, which is useful for procurement planning and compatibility checks. As a housed, diaphragm-based switch, the D2H family is commonly used to control relays, valves, or alarms in industrial equipment when a chosen pressure threshold is met or fallen below. Typical applications include pneumatic circuits, HVAC-related controls, and other process or automation setups where a compact, mechanically actuated pressure switch is preferred for reliability in harsh environments. The D2H line is characterized by its diaphragm sensor and rugged housing designed for industrial use, with this B18 variant occupying the lower end of the 0.4–18 psi operating window.