Seeing the current thread for Thermoworks, but not wanting to butt in there.
When I started taking my BBQ seriously, in 2011, I bought two Thermopens from ETI, the manufacturing company here. I later bought a third. I don't know who owns who - Thermoworks/ETI - but they are the same Thermopens you guys buy, and are calibrated and tested.
I really like them, but in the last 10 years, one of the 3 has given out completely (replace battery, nothing), one is taped up to prevent its battery cap falling out (but otherwise works), and one is still going strong.
We've just had a Prime Day here (dunno if UK and US Prime Days are on the same day), and amongst the things I bought were two of these, in black and in red.
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I paid £30 each for my Thermopens in 2011, they would be £40 to replace now. These thermometers are currently priced at £8.99, and were under a fiver each on Prime Day.
I've just tested them against my good Thermopen, in water at 4 different temperatures. They were within 0.3°F from the Thermopen. Simply moving the probe in the water changed the readings by that much, and in any event, if they actually were that much out, would it make any difference to my cooking?
Things I really liked about them, aside from the price.
• Can switch between °C and °F by pressing a switch on the front, rather than open it and flick tiny little levers.
• They have both a hold function and min/max temperatures.
• They have a magnet in the back, allowing it to be stuck to my smoker hopper or (in the kitchen) the fridge, so they are always handy. As well as having a handy meat temperature guide.
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I do think when I bought my Thermopens back then, they were way ahead of any instant read food thermometer. But now?