My Bro has a barazilian rainbow boa which requires quite a fricken bit of humidity. So he went to wal mart and bought a digital thermometer and hygrometer. His works perfectly fine and I think it was around 15 bucks. IT displays the average temperature of the day and the highs and lows of the day and the hygrometer is accurate too.. It reads about 90% humidity which is about right because it looks like a sauna in his terrarium. Anyways. I suggest checking out wal marts selection.