It'll read ambient if you suspend the probe in the middle of the tub/tank. This one is buried under the bedding on the hot spot. It reads about 90-93* when its left alone and goes up to 98* when the snake curls up ontop and traps the heat. Shows how much there bodies trap the heat making it hotter than the output.
I'm liking them. I picked up 2 to finish up an order to get free shipping. Which essential amounted to a buy one get one free with the thermometers. If been using the Walmart ones wher you place the u it in the tub. But after prolonged exposure to high humidity, from spilling bowls, they start to fail. I think I'll get more of these in te future.


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