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First of all, i am a FLIR distributor and have several full fledged thermal imagers, so am a bit over the top when it comes to IR measurement. However, I know a lot about IR temperature measurement, and I know the guy who runs Thermoworks. They would not sell anything that was junk. Looking at the offering, I would recommend their IRGun-S. It has a high enough temperature range, decent resolution, and is sale priced at $49 which is pretty good
Forget trying to measure anything shiny like all-clad. You will only measure what is reflected. For a baking stone, cast iron, and non reflective surfaces, .95 emissivity is fine. Sure close enough for cooking!