Hi all,
I just got one of those infrared thermometers, and it works great. I put it to the test against a precision calibrated thermocouple to see both how accurate it is, and how it responds in measuring surfaces of various materials.
What I did was setup a controlled temperature water bath in a glass beaker. On the beaker I placed strips of various types of tape to serve as the measured surfaces. The types included silver foil tape, a type of duct tape (which has a slightly shiney/reflective surface), standard black electrical tape, gray matte colored tape, and white matte colored tape.
I measured the temperature of each at several different temperatures - and here's what I found (the red lines over each group of columns are the actual temperature):
It looks like the IR thermometer is more accurate at higher temps than at lower temps. Also, it seems to do a very good job at measuring most surface materials, except for very shiney/reflective materials (which was expected).
Not bad for less than $50, I'd say.
- Mark
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