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Extech Thermo‑Hygrometer Pen (Model 445580)

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  • Humidity range: 5% to 95%
  • Humidity accuracy: +/-5%
  • Temperature range: 14° to 113° F
  • Temperature accuracy: +/-1.8° F
Availability: Typically in stock (Details)

We pay the shipping on this product with $350 of qualifying items (Details)


Product Information

The Extech Thermo-Hygrometer Pen measures temperature and relative humidity simultaneously.


This compact digital humidity/temperature pen offers contractors a wide temperature range of 14°F to 113°F and a humidity range of 5% to 95%, with accuracy of +/- 5% of humidity and 1.8°F.

This handy pen features maximum and minimum memory functions for both temperature and humidity.



  • Ideal for industries like HVAC, laboratories, hospitals, computer rooms, greenhouses, printing, film processing and more
  • Fast response and high accuracy
  • Temperature
  • Humidity
  • Min/max memory
  • F/C switch
  • Data hold freezes measured values
  • Auto power shuts off after 20 minutes
  • Fits in your pocket
  • Affordable 



  • Temperature range: 14°F to 113°F
  • Humidity range: 5 to 95% RH
  • Temperature accuracy:±1.8°F
  • Humidity accuracy: ±5%
  • Resolution: 1°; 0.1% Rh
  • Power source: 1-CR2032 battery
  • Dimensions: 5.9 x 0.8 x 0.6 inches
  • Includes two batteries


More Information
Thermo-Hygrometer Temp Accuracy ± 1.8°F
Thermo-Hygrometer Temp Range 32° to 122°F
Thermo-Hygrometer RH Accuracy +/- 5%
Brand Extech
Thermo-Hygrometer Calculations Rh, Temp
Thermo-Hygrometer Temp Accuracy ± 1.8°F
Thermo-Hygrometer RH Range 10 to 90%
Category Thermo-Hygrometer
Warranty Information One (1) year from the date of purchase on parts and labor
Condition new
Manual / Schematic