The 41B13DGA2AA040 Pressure Switch is ranged for 1000 Torr, has a size NW16 ISO-KF flange, 20-30 VDC Input, a 9-Pin Type "D" male subminiature electrical connector, energizes with pressure below the set point, and accuracy of 0.5% of Full scale. It is referenced to atmospheric pressure, and offers accurate and reliable protection for vacuum vacuum/pressure processes. Designed for applications where a DC signal output is not required, these switches provide relay outputs that are readily interfaced with alarms, valve actuators, computers, process controllers, load locks and other protection devices.