Review on 🌡️ BTMETER BT-985C Infrared Thermometer Gun: Non Contact 16:1 IR Laser Temperature Gun for Food Cooking, Kitchen Grilling, and HVAC -50℃~800℃ (-58℉~1472℉) [NOT for Human Temp] by Dave Russell

Good: I like the circle of the lasers and that the measuring range doesn't get too big with distance : During the last cold weather I was able to use this, to determine how close pipes and engines are to freezing, but this gave wildly inaccurate results. It turns out that the readings are useless unless the device is in a "room temperature" environment. After thinking about it for a long time, I'm still not sure whether to set C or F when setting up alarms. The upper range is technically configurable anyway, but it defaults to 1400. It's very confusing because the last digit is smaller than the rest - is it part of the timing parameter? Tenth degree? I am not sure. But you can adjust it one degree with one click, so if you want to do it 212, you have to push buttons for an hour - no exaggeration. It says you can adjust the emissivity - but it took me a long time to figure out how. All other settings are shown below, but when in emissivity setting mode nothing changes on screen at all. Finally found out by accidentally fiddling with other buttons when the change area is empty the emissivity numbers above can be changed. But again only individually. So if you want to go from 0.95 to 0.70 you have to click on it 25 times. Pooh. Holding it down doesn't auto-advance it. Most of the time it seems pretty accurate, but sometimes it gets lost. When I first checked the freezer temp it jumped from -29 to -15. I tested with a regular thermometer and got -4, and on later tests this meter gave similar temperature readings. Searching the web I couldn't find any site that would give me more information on how to run it. Or any website of any kind about this company.