Infrared thermometers can be calibrated for accuracy just like other thermometers. In ETI's Calibration Laboratory technicians use industrial black bodies to calibrate infrared thermometers with certification traceable to National Standards. UKAS accredited certification of IR Thermometers may be obtained from ETI on application and quotation. Black bodies approximate zero reflected ambient radiation and therefore the unimpeded emission of infrared energy for a given emissivity value, typically 0.95.
Without having access to a black body, the next best way to calibrate your infrared thermometer is to use a simple, inexpensive Infrared Comparator Cup. It is best to calibrate your infrared thermometer at more than one temperature (at 5°C and 60°C] for example) and the Infrared Comparator Cup makes it easy.
If neither of these are available, you can do a quick calibration using a properly made ice bath.
Using a boiling point for calibration is more difficult with an infrared, factoring in variables in air pressure and elevation, are further complicated with infrared thermometers owing to the steam generated by boiling. That steam and the evaporative cooling and condensation that ensues makes it difficult to obtain an accurate infrared measurement of a boiling liquid. But the surface of a properly made ice bath is a dependable 0.0°C
Comparator for infrared thermometers. portable & easy to use no external power required allows economical infrared thermometer checking
RayTemp 2 Infrared Thermometer high accuracy ±1 °C over 0 to 100 °C FREE traceable certificate of calibration displays ambient temperature records the max/min temperatures designed & built in Britain
RayTemp 8 thermometer kit two thermometers in one includes differential & average temperatures target ratio 12:1 pocket-sized & simple to use range IR -60 to 500°C range probe -64 to 1370°C
Insulated Ice Bath Mug for temperature calibration checks ideal for rapid, simple calibration checks mug permanently printed with detailed instructions portable and lightweight double wall insulation