For all you new and even seasoned snake keepers, you may find it frustrating to get an accurate reading of your enclosures temperature and humidity. Below I am going to share an item that took me months to find through all these other so called options.
http://www.amazon.com/dp/B004167QI8/...keywords=xikar
The Xikar temperature/humidity gauge!!! It is accurate to 1% humidty/temperature. Buy 3 of these and place them in the tank with double sided tape. 1 in the basking hot spot, 1 in the middle of the tank, and 1 in the cool side. These are used by cigar hobbyists for their cigars, but they just so happen to be amazing for snake enclosures.
To calibrate it, buy a Boveda humidity pack. You place the Xikar gauge inside this pack and leave it for 4 days. You will get an exact reading of 74 to 75% humidty.
http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1