The Dwyer 1831-1-RA-S combines small size with 4% set point repeatability. No power is required to operate the DPDT switch, which means no additional wiring or conduit reduces material and installation labor costs. Set point adjustment on the switch is easily accessible for modifying the set point.

The Dwyer 18311RAS DPDT Low Differential Pressure Switches with Manual Reset eliminate common problems associated with typical high duct static cutout installations. Since the 1831-1-RA-S requires absolutely no power to drive its outputs, a separate power loop and its associated additional wiring and conduit is alleviated, reducing material and labor installation costs. Both control contacts of the 1831-1-RA-S activate at the same time. The potential of the lead switch shutting down the fan preventing the lag switch from sending an alarming signal to the DDC is no longer a probable system liability. Potential costly maintenance calls are diminished. Unlike typical switches that posses only a single conduit entry for both control loops, the 1831-1-RA-S provides two conduit connections simplifying wiring while eliminating additional conduit tees. The 1831-1-RA-S and its specifications and features make it the superior choice for high duct static cutout applications.