No son, that’s not a hygrometer.
Got a fondness for trigonometry? Were you a ‘mathlete’ back in high school? If so then you’ll want to proudly hang this Unit Circle Wall Clock in your office or cubicle. Depending on where you work your co-workers will either get a good chuckle, or continue to avoid walking by your office at all costs.
Unfortunately the maths were never my strongest subject in school (I excelled at field trips and statutory holidays) and that coupled with my inability to tell time with an analog clock means I’ll probably be sticking with the digital variety, but you can get one of these from CafePress for just $15.99.