General Tools Calibratable Multi Function Digital Psychrometer, Wet Bulb Capable (EP8709)

Accurately measure any environments temperature, relative humidity (RH), dew point, wet bulb temperature and other moisture parameters Features a jumbo backlit display with double readout; minimum and maximum temperature button and data hold button on device as well This device is field calibratable using optional 33% and 75% salts; toggle between Fahrenheit or Celsius with switch Monitor battery life with low battery indicator; psychomotor an Auto Power Off saving your battery when not in use ( can be disabled for calibration) 9V battery included; limited 1-year warranty, Weight: 0.5 pounds, Manufacturer: General Tools & Instruments