Handheld infrared thermometer Temperature range using infrared –60 to +625 °C (–76 to +1 157 °F) Environmental limits Operation 0 to 50 °C (32 to 122 °F) 10 to 95% R.H. Storage –20 to +65 °C (–4 to +149 °F) 10 to 95% R.H. Full range accuracy (Tamb=23 ±3 °C) Tobj = 0 to 625 °C ±2% of reading or