Well John,
Sorry to say but that's a poor setup. You don't really have a clue what the temps are but you should. The idea is to have a set up with the ideal conditions and then... settle for a little off.
Your snake will be ""fine"" till there's an issue then it won't be fine.
It dosen't have a choice in the matter.
Perhaps I'm misunderstanding something then. The specs on the heat pad say they increase that side of the tank by 5-10 degrees. If in the cold of winter (living in WI), if our house temps are 70-75 (never go above that), with that heat pad alone, that should then make the warmer side between 75-85 at any given point. We then have a 50 watt basking light which is on sometimes above the warm side, so add a few more degree there - the hot side has never gone above 88. I just don't see this critical need to monitor to a nth degree what that side is at; in the wild, I don't think snakes are critical within a few degree as to where they will hang-out - if one area is too hot, then they'll move slightly off of a hot-spot to where the temp meets their need; likewise, if it is too cool, then they'll move to where it is warmer. After feeding, both snakes always go into a hide on their warm side; so, they know where the warmth is and can adjust themselves according, no? Perhaps if we had an aspen bedding and the snake dug down and got to rest his body right on the glass bottom, then I could see some potential for burn issues, etc., but with our reptile carpet, that hasn't happened; perhaps worth noting.