malcom
before you go too far down this track you might like to research some other devices or at least have a way to calibrate these things. I now have three sensors in the same room 2x dht22, 1 dht11. the dht 11 reads 60% the dht22's read 46.3 and 49.5 right now @19.6C (tis as close as they seem to get) . real hum is anyone's guess , the readings tend to converge @ around 20C but diverge wildly below 10C and above 30C. there is some info on the web about bedding these sensors in or "reforming them" . not sure how fussy reptiles are , I do know how fussy the cold blooded half of the human race is