Hygrometer Suggestions

Hi guys, I've been using one of those simple humidity gauges that you stick to the viv's glass, but it seems to have stopped working.
I'd like to get a new one that is very accurate and that is water proof. The only problem is that I need one that doesn't have a bunch of super long cords attached to it because it needs to be inside the terrarium, and I don't want a bunch of astrew wires inside.
If you guys could link me to the hygrometers that you use or that you know work, that would be wonderful, thank you.

I went looking for the same thing for my geckos awhile back. Personally I think these thermometer/hygrometer combos are the best. They are designed for cigar cases an run off a single 357A button battery (same one as zoomeds and exo-terras). They have no cords, instead they have an adhesive back to attach to the wall, but also a secondary magnetic attachment so you can remove the unit temporarily if need be.

I found them to be quite accurate out of the box, but the nice thing about them is that you can adjust and calibrate the humidity portion using a cheap calibration commercial kit. We use these.