I'm more of a set it and forget it kind of girl myself - I set the racks up - measure temps and humidity - and then I'm done - I dont keep a hygrometer in each and every tub - I kind of judge my tweaking on what the snakes are telling me they need. I do have a thermostat/hygrometer that I keep an eye on in the snake room - if the humidity dips beyond a certain point then I will turn up the humidifier or spritz the cages if needed.

For my egg boxes I use a thermometer hygrometer by Flukers ($14 at LLL) in each box - they are small can stick on a wall and are really accurate but I'm not sure if a full grown ball would be able to pull it off the wall or not. Bean Farm has a thermometer hygrometer that takes both measurements at the probe (first one I've seen that does that) - I've thought about giving it a try - but I think they are asking $30 or so for it so I'm not sure I really need to spend that for what I'd be using it on - but it might work for your purposes.

Otherwise - I'm sure you can find a way to wire the Accurite ones to your tubs!

Good Luck!