I'll just throw out that, IMHO, non-contact thermometers are not nearly as accurate as folks think they are- you cannot simply point them at anything and see what their temperature is. I see people using them to measure air conditioner output- not good- refrigerator temps- also not good- it all depends on the material you are trying to measure. Shiny surfaces will tend to read below true temp, black surfaces tend to read correctly.
https://www.google.com/search?q=ir+gun+emissivityThey are handy for quick measurements, and can be compensated for, but point, shoot and read the temp- not so much. If I need to know a temp, I use a thermocouple or thermistor in contact with the item.