Reed Instruments Reed 8706 Digital Psychrometer/Thermo-Hygrometer (8706)

Sold as 1 Each. Measures relative humidity, air temperature and quickly calculates wet bulb and dew point temperatures. Backlit LCD display. Internal temperature range of -4 to 122 degrees Fahrenheit (-20 to 50 degrees Celsius). Dew point range of -109.7 to 122 degrees Fahrenheit (-78.7 to 50 degrees Celsius). Powered by two AAA batteries. 7"H x 1.9"W x 1.5"D. Humidity range of 0 to 100% RH. External temperature range of -4 to 158 degrees Fahrenheit (-20 to 70 degrees Celsius). Wet bulb range of -6.9 to 122 degrees Fahrenheit (-21.6 to 50 degrees Celsius). Grey. Humidity resolution of 0.1% RH. Temperature resolution of 0.1 degrees Fahrenheit. Wet bulb resolution of 0.1 degrees Fahrenheit/degrees Celsius. Max /Min/Avg readings and Data Hold. Humidity accuracy of + or -3% RH. Temperature accuracy of + or -1 degree Fahrenheit (+ or -0.6 degrees Celsius). Wet bulb accuracy of + or -3% of full scale.