Extech RH390 Humidity Testers - Hygrometers - Style (Psychrometer): Hand Held, Accuracy: ±2%RH, ±1.8°F/1°C

Extech RH390 Dual Display Hygro-Thermometer Psychrometer Precision meter measures relative humidity from 0 to 100 percent with an accuracy of ±2 percent RH and Temperature from -22 to 199 degrees F (-30 to 100 degrees C) with an accuracy of ±1.8 degrees F/1 degrees C. Capacitance RH sensor provides a response time of less than 30 seconds. Additional Features The dual backlit display of Temperature and Humidity can be switched to show Humidity and Dew Point (-22 to 199 degrees F/-30 to 100 degrees C), or Humidity and Wet bulb (32 to 176 degrees F/0 to 80 degrees C). Slim design with rubberized sides provides improved grip. Other features include data hold, Min/Max record, Auto Power Off and low battery indicator