The Weather Store offers psychrometers for determining relative humidity (RH). Psychrometers utilize wet bulb and dry bulb temeprature readings with a chart to calculate the RH. Although not as convenient as hygrometers, psychrometers are very useful in obtaining a very accurate RH reading which can be used for calibration purposes.
The Weather Store 146
Main Street. Sandwich, MA 02563 Tel.:1-800-646-1203 Fax: 1-508-888-6398 E-mail:pmadden@theweatherstore.com Open: Mon-Fri 10am to 5pm, Sat 10am to 1pm
