If anyone smokes cigars and owns a humidor, here is a link to a great hydrometer that is very accurate for me (within 1% RH). It usually goes for $20 but cut down to $10 at your local store with coupon !
http://www.radioshack.com/Coupons/Coupons.asp?cookie%5Ftest=1&hp=coupons#
Make sure to do a salt-calibration test to see how accurate your hydrometer is and to compensate whenever you look at it.
Has great features such as backlight, high/low temp/humidity, digital temperature in increments of 0.1 F and relative humidity in 1 degree increments.
http://www.radioshack.com/Coupons/Coupons.asp?cookie%5Ftest=1&hp=coupons#
Make sure to do a salt-calibration test to see how accurate your hydrometer is and to compensate whenever you look at it.
Has great features such as backlight, high/low temp/humidity, digital temperature in increments of 0.1 F and relative humidity in 1 degree increments.