http://www.horticulturesource.com/e...1894/?osCsid=8fdbb9e837b587cb8158bc2e0c023bde
I use this. I like it because its got a 10ft cord with waterproof probe at the end and has a big lcd display that measure temps from the probe and from the lcd. Its not too expensive either. I also originally bought a flukers one but it cannot get wet so I have that one in the middle of the cage where no water hits and this one under the basking spot. I looked at 2 home depots and the cheapest they had was 29.99. My home depots suck I guess