Is measured, the longer, the higher the deviation. Only one more and longer measurement break and adapt to the room temperature 18 degrees brought back something higher readings, yet too much differ from the actual temperatures. 5 degree difference from the existing temperatures, which is already more than 1.5 degrees. Followed by the 1.5% related I do not know.
Brought water to a boil and let a little while to calm down, just under 80 degrees have been identified.
In fridge permafrost was measured, which is not certainly the case.
Temperature variations to determine, such as gaps in the insulation track, but it was good enough. On the accuracy I am already received, but there is of me 1 point. (My Black & Decker TLD100 has a significantly lower deviation, more functionality and does not cost so much more.) In order to find weak points in the insulation 4 points. Accuracy with laser not really good - 2 points, the deviation is higher removal ever larger. The brightness of the laser well, handling well, lighting good = 5 points. The workmanship is good, material feels pleasantly and without sharp edges.
To check on a boards components on their temperature towards the laser not feasible, the deviation is too high and later becoming, depending on the distance.
In the food sector, for example in order to check cooling / heat, too imprecise.
Give at the reasonable price 3 stars because useful to useless depending on the application.
