Cooper Cooper-Atkins 535-0-8 Cooler Thermometer with Magnet, -20°F/120°C

I bought two of these back in 2014 for our camper. Fast forward to 2023, and our camper was totaled by hail, so we just bought a new camper. I was so happy when I found out this thermometer is still being sold. I don't need fancy digital thermometers, or remote thermometers.....I just need a good, simple thermometer that I can see, at a quick glance, that my fridge is cooling properly. These fit the bill!

Purchased several of these to stick in the coolers for farmer's markets. They monitor the cooler temp and because they stick to the side, they don't get lost in the cooler or left behind at home. Low profile, inexpensive....what's not to like?

Total garbage. Just can’t calibrate it to current temperature. Now reads 120 in 70 degree weather.

Fine, accurate AND ADJUSTABLE [ignore the answers that say it isn't adjustable] There is a small screw in the middle of the back that lets you set the needle to a known temperature, or to match another thermometer known to be accurate, or to the local news reports. I had to make a hole in the middle of the magnet block so I could still get at the screw later. Mounted it on a small piece of galvanized metal slipped into the window trim on an outside window. It also came with three small double sided mounting pads.Cooper-Atkins 535-0-8 Cooler Thermometer with Magnet and Adhesive Tabs

But some issues. 100% plastic. Comes with an adhesive magnet or rubber feet. Sadly the glue on the magnet is as weak as the magnet itself (okay, overstatement, the magnet actually works better: it at least stays on the metal.). Otherwise, it looks good. Not sure how well it's going to last at my work station though.... Does seem to be accurate though.

If you need a cheap way to tell the temperature then this thermometer should do the job just fine.I've got 3 of these now, one for the fridge, one for the freezer and one that I stuck to the wall a month ago (no sign of it falling down yet). They are really great for when you're curious about the temperature in a variety of locations but aren't curious enough to spend a lot of money on it. Having the choice to use either magnetic or adhesive attachment is extremely nice.

Super convenient, and easy to read. I am not totally convinced that they are accurate, because one of them in my fridge read 40 degrees, but the water bottle froze solid....

The magnet is VERY weak. We have removed and glued on stronger.

It does its job of showing the temperature, but the magnet glue isn't very strong, so it fell from the fridge. Also, it's smaller than I thought, the diameter is smaller than my thumb. I'd search for another one a bit bigger if I could spend a bit more.