Quote:

One thing people don't always realize with IR temperature readers. You actually read a much larger area than just the 'dot'. The cheaper ones will have something like a 6:1 or 8:1 ratio. Meaning that if you are six inches away from your target, you are actually measuring the average temp in a 1" cirlce, not just on the red dot.





good point. I think mine is 1/2 area or less. I need to look now that I think about it as it was an expensive one. With that, I still get the variance because that header coating isn't the same thickness when it is sprayed either.