Adhesive, sticks to glass or ceramic jar. Not particularly pliable though, so the jar should be cylindrical or very close wherever you apply it to avoid wrinkling.
Indicates temperature within ±2°F ranging from 46°F to 84°F.
I’ve got 5 of these combination temperature and humidity % sensor. They’re light, simple, reliable, cheap. I’ve got one in each room and two in the kitchen because honestly, why not?
Taylor USA has a good few options that make sense, depending what you need. Refrigerator thermometer? Proofing thermometer? Instant-read probe? They got it! The unifying factor is their made-in-the-USA quality and consistency.