For measuring the surface temperature of a plancha, allows me to determine more or less hot zones (display and continuous measurement as the trigger is pressed) without any problems. I do not épiloguerai on measurement accuracy, 4 or 5 degrees more or less does not worry me in loccurrence. I tested out the water in my aquarium and the result is the immersed bulb temperature, so quite reliable results. Minimalist packaging for the product (the Amazon is OK). Instructions in English and very succinct; That said, it is very easy to use.