The Rayteks have different levels of accuracy all within the slightest variance in temperatures. But you also pay a high dollar for them. Here is their site www.raytek.com
. Truthfully though for the money Ravi's is great try it out. Drop by the show or the the store too see one and pick it up from Ravi at the show. For $50.00 I think is what he sells them for you cant go wrong.