I use an accurate Fluke Infrared model ($50), from my workshop. What I like to use it for is not for Mash temp, Boil Kettle.... But, for temperature checking of things like my starter on my stir plate, or the wort once in my BB prior to pitching.... It makes a good simple check to see whether things are 95 degrees or 75 degrees...
~ BIAB : All Grain Made Easy ; Mash, Sparge, Boil all in the same Kettle ~ all you need is a bag and a hook!