A Hygrometer is the instrument that measures Humidity. The two main types of Hygrometers are Analog and Digital.
Analog Hygrometers react mechanically to the ambient humidity and represent that value on a dial. Many high quality Analog Hygrometers use horse hair, which expands at a predictable rate when the humidity increases. Analog Hygrometers may have to be calibrated approximately every six months to maintain accuracy. Many Analog Hygrometers have an adjustable dial in the back, or inside, that can be moved +/- with a small screwdriver.
Digital Hygrometers typically use electric currents to measure humidity, so they require batteries. In general, Digital Hygrometers tend to be more accurate than Analog Hygrometers, and they may or may not be adjustable.
Checking Hygrometer Accuracy:
Table Salt Method
Mix 1/2 cup Table Salt and 1/4 cup water in a vessel, then place in an airtight container (i.e. ziptop bag). After 24 hours, at room temperature, the humidity in the bag will be 75% (RH) - table salt will seek equilibrium at 75 RH. Adjust your Hygrometer accordingly, or just remember what +/- to factor in.
Damp Towel Method (less accurate)
Wrap your Hygrometer in a damp (but not dripping) towel for 20 minutes. Afterwards, the humidity in the towel will be 98% (RH).
TOUCH & FEEL
While it is helpful to use a Hygrometer when quickly checking the condition of your cigars, there is no substitute for your sense of touch. Every connoisseur knows that cigars must be felt to ascertain their condition and disposition. A cigar should feel silky and smooth to the touch. A well conditioned cigar should yield slightly when gently squeezed between your fingers. The wrapper should not crack or make a sound. When you release the depression, the cigar should slowly regain its shape.
