Big Digit Hygrometer / Thermometer with Dew Point


SKU: A15-MT-HTD Categories: ,


Temperature RH and Dew Point are displayed simultaneously for fast checking results. Plus the userprogrammable, audible and visual alarm will warn you if the humidity drops too low or goes too high keeping you in the know instantly. The Extech HygroThermometer Humidity Alert could be a great choice for a lab or a greenhouse.  You’d be able to identify when growing conditions are right or when you need to make certain adjustments to fend off mold or other impurities. Includes a built-in stand for use on any flat surface bracket for mounting on the wall and 2AAA batteries.


  • %RH audible and visual alarm alerts when humidity exceeds set limit
  • Displays Dew Point temperature
  • Max/Min with reset function
  • Humidity: 10 to 99%RH
  • Temperature: 14 to 140°F (-10 to 60°C)
  • Basic Accuracy: ±4%RH; ±1.8°F, ±1°C

Additional information

Product No.


Humidity Range

10 to 99%

Temperature Range

14 to 140°F (-10 to 60°C)

Basic Accuracy

±4%RH; ±1.8°F/1°C

Additional Resources:
Data Sheet