Product review (5 stars): Great, accurate little thermometer and hydrometer!
I bought this to place in my incubator as a back-up thermometer and hydrometer for hatching duck eggs. I first tested it in several different rooms of the house. Then I placed it in the cold incubator and turned it on without water, and after it was warmed up and running, I then added water. At all stages of my testing it had a quick display response and was accurate. I'll update more once I've hatched out our duckings.
I'm pleased so far and think I will continue to use this after we're done with the incubator... I have many plants, several of which require higher humanity, and though I monitor them, it'll be great to get an accurate read on their environment.