Pro exotics are good except the 2 cheaper models have a 1:1 distance to spot ratio. This means to get an accurate reading you have to have the temp gun right up next to the spot you are measuring. For instance, holding it 12" away it measures an area 12" in diameter.

The more expensive model PE2 has a 6:1 distance to spot ratio so at 12" it measures a 2" diameter spot.

I just got a used PE2 off Ebay for $19 shipped. It has a laser target spot as well. Goes for $45 new.