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Jury is still out on accuracy. I have a radar type thermo that I also use and there are some discrepancies, but frankly I don't know if my cheap radar is faulty of the new surface thermo!! At any rate I like it because you can mount it to exactly where you need it and adjust burners as required.
I bought a Black Stone 28" flat top griddle and I am never sure how hot the grill top is. I looked other thermometers and read some of the reviews. I noticed that a few of the reviews stated that their thermometer was off a few degrees. I tested my grill top thermometer using two different types of thermometers. One being a quick temperature test thermometer that home cooks and professional chefs use and the second being a oven hanging thermometer all varied slightly in temp but were very close. I have noticed that the temperature reading varies based on outside conditions, wind, rain. I am very happy with my section and I at least now know within a range the temperature of my flat top.
Sturdy thermometer, quick delivery. However, was not the right thing for my application. I needed an instrument that would go to lower temps. I was trying to measure oil level, in a flat sided tank, by temperature difference between filled and empty portions. Better luck next time. I will save this for the future.