Barksdale D2S-A3 Pressure Switch

Barksdale D2S-A3 is a dual-setpoint mechanical diaphragm pressure switch designed for industrial control, rated to switch up to 480 VAC at 60 Hz and to operate within a low-pressure range of 0.03 to 0.30 psi, enabling precise monitoring in compact control circuits. The unit uses a 1/4-inch NPT pressure connection and is part of Barksdale's D1S/D2S diaphragm switch family, which provides two independent actuation points for safety and control interlocks. Electrical contacts are rated for up to 3 A at 480 VAC, allowing direct connection to relays or safety interlocks in equipment such as boilers, furnaces, and HVAC air-handling systems. As a dual-setpoint member of the D1S/D2S lineup, the D2S-A3 delivers reliable, repeatable performance in industrial environments where low-pressure sensing is critical.