Humidity Guage/hygrometer

Hello all,

This is my first thread on any forum so I apologize for lack of etiquette and such.
That aside, as a new Savannah Monitor parent and doing further research on proper husbandry it is clear I need to incorporate a reliable means of telling humidity in her enclosure.
Does anyone have advice on a good brand of hygrometer? And also where would be a good location for it to be placed?