The C816FS offers quick convenient temperature checks for all food applications. Target illumination shows measurement area so user can move closer for more accurate readings. HACCP temperature danger zones indicated with clear safe/unsafe LED warnings: Green - temperatures are within safety guidelines and outside danger zone Red - warning - temperatures are inside the HACCP danger zone and potentially unsafe - HACCP danger zone set at 4 degree C to 60 degree C/ 40 degree F to 140 degree F Washable IP54 rated cases Instant, non-contact readings can reduce product wastage, chance of cross contamination and staff time carrying out checks 7 second display hold with auto switch off Two-year warranty Working Range 12mm to 300mm (0.5ins to 12ins) Minimum Target Size 12mm/0.5ins Distance to Spot Ratio 2.5 to 1 Target Illumination High Brightness LED Spectral Response 18 to 14 microns Preset Emissivity at operating temperature of +23 degree C/+73 degree F For targets below 0 degree C/+32 degree F 1.0 For targets above +23 degree C/+73 degree F 0.97 Measurement Range -30 degree C to +205 degree C / -22 degree F to +400 degree F Accuracy For targets between 0 degree C and +65 degree C + or -1 degree C For targets between +32 degree F and +150 degree F + or -2 degree F For targets below 0 degree C/+32 degree F + or -1 degree C/2 degree F, + or -0.1 degree/degree For targets above +65 degree C/+150 degree F + or -1.5% of reading Environmental Protection IP54 Ambient Operating Range Temperature 0 degree C to + or -50 degree C/+32 degree F to +122 degree F Humidity at +30 degree C/+86 degree F 90% (+ or -5%) RH noncondensing Battery 1 x AA alkaline Battery Life 10 hours @+23 degree C/+73 degree F Weight with battery 150.g/0.33lbs Dimensions Length 150mm/5.88ins Width 30mm/1.25ins Depth 50mm/2ins