Rack systems and thermometers

Hey everyone long time reader first time poster,
I just finished building my new rack setup for
My ball pythons, and My OCD come into play where I like to know the hot side and cold side temps so my question is what thermometers does everyone use that are not crazy expensive and some what reliable?

Thanks for the help
Tom

These are always decent, can be found at Walmart and Home Depot too :)

And welcome to the forum! :D

Your best bet would be a temp gun