• RHT3
  • Manufacturer has 4 in stock
    This stock is typically available to ship in 3 - 5 working days.



  • RH range: 20% to 95%
  • Temperature range: -4 to 140°F (-20 to 60°C)
  • Wet Bulb (calculated) -4 to 140°F (-20 to 60°C)
  • Dew Point (calculated) -40 to 140°F (-40 to 60°C)
  • Continuous graph plots
  • 5 user-settable high/low alarms
  • 4 records: each contains 100 data points
  • Post images directly to social media
  • NOTE: iOS/Android device not included


The Extech RHT3 EzSmart Hygro Thermometer makes your iOS® and Android™ Smart Devices* even smarter combined with the free app from iTunes® and Google Play™ store! This unique technology provides iOS/Android device owners the ability to take quick, general readings of Humidity and Temperature. Further analyze these readings with the handy trend graph feature.