IR Thermometer

I would think that an IR thermometer needs a solid surface to project the light on to in order to get an accurate reading. I'm not a physicist though, so it would be interesting to see if it works.
 
yeah I bought one of these about 8 months ago on woot for 15bucks shipped.

they do work for the tank mainly its reading the glass temp... I think..

and its about 2deg off from what my chiller says...
 
Yup, just like the peel and stick thermometers that you can put on your glass, the error correction is going to be like +/- 2-4 degrees.
 
I am so bad with names, but our resident doctor, stated last year when this topic came up to not waste your money. He did not even like to use them in his practice due to inaccuracy.
 
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