Digital LCD Fish Tank Aquarium Marine Water Thermometer - -50°C to 70°C

Simple to use, inexpensive to buy. I bought 4 of these to monitor temperatures in different parts of my vivarium (it's big, so temperatures range up to 20 degrees F sometimes). To check them I have a separate analog (dial) thermometer and I also put the four sensors (remember I bought four of these, so one sensor each) right next to each other for about 24 hours. The biggest difference in temperature reported by the side-by-side probes was one degree. Good enough for me. I also like that I can stick the probe directly in the super-humid vivarium but keep the electronic part of the unit outside in the relatively dry air.

I'm so glad that it was inexpensive. You get what you pay for, I guess....I didn't return it cause it wasn't worth the trouble, either

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I use this unit for a water temperature guage in my boat. I fastened the probe to the dash temp probe and mounted this unit on the back transom, Now the back seat person can see the lake surface temp. and when anchored and facing backwards I can also see the surface temp... Try it works great....

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