... corrosive atmospheres, the 117 Series can be used to measure vacuum, pressure, differential pressure or temperature in a variety of applications ... set Point “lock” adjustable ranges:“wc ranges: 300 “wc vacuum to 250 “wc pressure (-747 to 622 mbar)Pressure: 30 ... Scale Pressure: “Low-Medium-High” increm Sealed Pressure Switches, Vacuum Switches, Differential Pressure Switches and Temperature Switches