So being the gadget freak that I am, I picked up the Ryobi IR001 Non-contact Infrared Thermometer. (Home Depot $29)
Needless to say you can check the temperature of just about anything. I checked the temp of my rotors and calipers after some errands in my 07 Tahoe, this is what I got..


Front left rotor 160 F caliper 103 F

Front right rotor 156 F caliper 108 F

Rear left rotor 125 F caliper 90 F

Rear right rotor 120 F caliper 89 F

What does it mean… absolutely nothing really..
But the IR thermometer is a cool way (no pun intended) to check to see if the rotors are heating unevenly from uneven braking, you can even see what the tire temp is.
Some other things I pointed it at were the catalytic converters 315 F, the oil filter 165 F


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lol thats geeky awsome, I would point it at crap all day; how close do u have to be?

 

the times I have used it I am typically about 4-5 feet away it came with insturctions but im above instructions....

 

A very cool tool, I've been using it on boat engines, and everything else since the mid 90's, when my first one cost $199.
Move it slowly along the block and see which cylinder is running 50f hotter or cooler. Run along exhaust to find restrictions or unseen corrosion blockage. True water temp at thermosat housing. Oil or trans fluid temp at the pan. Even on electrical wiring, starters, alternators for bad windings or over amp conditions. Just the greatest little tool fortroubleshooting since the test light.

 

excellent ideaabout using it to check electrical wiring temperature….