Are these optical pyrometers suitable for a potter?
Notice the title says "Emissivity Adjustable". That is important because for accurate measurement, the emissivity of the object you point the gun at has to be known accurately. In industry consistent results with this type of instrument depend on always aiming the gun, at right angles, at a specific target in the kiln (e.g. a firebrick), whose emissivity is known exactly for the target temperature (from the technical data from the manufacturer) and which has a surface of consistent roughness that remains stable firing-after-firing. If you are a potter you do not have calibration instruments and emissivity data. And you are probably not inclined to carefully set a piece of kiln shelf, for every firing, vertical at right angles to the peephole and blocking view of the cones! Even if you do, remember the gun calibrates to one temperature. And getting it to work is a matter of waving this plastic fun in front of an open peephole and hoping for the best before it melts! Perhaps it is better to spend this money on thermocouples instead.