IR infrared thermometer ST840 1)testing range: -25--840C, -13--1544F 2)D: ... )resoulution 0.2C,0.4F 4)can select C/F Digital Infrared ThermometerModel: ST840Shenzhen Sanpo Instrument Co.,Ltd (A2) IR infrared ... great many of emissivity symbol.Use abroad: can used for food, safety-inspect,fire inspect, power vehicle and diesel engine,plastic ...