HygroSet Humidification System is the first calibrated digital capable of being adjusted. HygroSet Humidification System frees you from worrying. Your digital hygrometer is always accurate. With each click of the adjustment the humidity display can be changed (+ / -) by 1%. It helps you to perform the 75% salt test without much hassle. It liberates you from memorizing or label the differential for your hygrometer. The HygroSet System Series measures both humidity and temperature with almost perfect accuracy. The HygroSet is a rectangular in shape and measures 2 W x 1 7 /8 H x 9 /16 thicknesses. To own your personal HygroSet Humidification System, place an order now.