Frank W. Murphy A20T Series Temperature Swichgages®

• Dial: Black with white markings. • Case: Glass filled/Polycarbonate, corrosion-resistant with polycarbonate, high-impact lens. • Bezel: Polished stainless steel. • Temperature: 130-250° F. • 1/2” N.P.T. • Fits standard 2-1/16” opening. • Diaphragm-actuated, temperature-indicating gages, with built-in electrical switches for tripping alarms, and/or shutdown devices. • These vapor actuated gages feature a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapor creating pressure against the diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gage reading. • The gage pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contact(s) are isolated from ground.