Dennis - There is a ton of info on the web on infrared thermometers. Here is a fairly basic and concise
Fluke web page on how-to-use one. Without giving a lot of background info, I think most home shops can get the temp sensing you need using an 8:1 or 12:1 ratio device. There are lots of differnet brands/models out there. Some dirt cheap and others very expensive.
My only experience with them is I have an ES Model
EST-65 Infrared Thermometer that is actually kinda overkill for a hobby user. It was formerly owned by fellow Bolter
George "Wrenchbender Ret." Capito, who gave it to me prior to his passing in January of this year. He was a long time Master Mechanic who was highly respected for his knowledge and experience in the Truck and Automotive world, so I have to say it's probably right on target for being a very good and accurate tool for the job.
