I use an accurite with the hygrometer with it and i do not use the probe. i put the whole thing in and then read it from the window. do you have an still air or forced air.
walmart has accurite for $11.88 it has high/low readings for temp and hum. as large display and it's slim. my walmart doesn't sell water wigglers anymore i found some at dollar tree. someone said to avoid the red ones cause red collects heat could give you a false reading? i don't know, sound possible so i got a yellow one
Just checked the bator I want to get from Cutler supplies, it comes with a thermometer, but it doesn't say what type. I will check our walmart here to see if they sell the accurites!