I think the UTH that I got with the snake/tank I bought yesterday died. How can I tell for sure? Maybe I killed it by plugging it directly into the extension cord and not the Repti Temp Control?

If it is dead, is this a good one to get to replace it?
http://www.amazon.com/Zoo-Med-ReptiT...ef=pd_sim_lg_2

Can someone recommended one if it is not?