Extech 445815
Hygro-Thermometer Humidity Alert II with Dew Point

  • Large, easy-to-read triple LCD displays % Relative Humidity, Temperature and Dew Point
  • %RH audible and visual alarms, with adjustable set points, alert when humidity exceeds set limit
  • Probe clips onto meter or extends on 18" (457mm) cable
  • Max/Min with Reset function
  • Rear calibration adjustment pot for Humidity and Temperature (NIST certification and optional Calibration Standards available)
  • Humidity: 10 to 99%
  • Temperature: 14 to 140°F (-10 to 60°C)
  • Basic Accuracy: ±4%RH; ±1.8°F/1°C
  • Dimensions 4.3x3.9x0.78" (109x99x20mm) Weight: 6oz (169g)
  • Optional calibration salt bottles
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Extech 445815 Shown

Product Information
Datasheet 318 KB
Users Guide 121 KB
PDF Help
  • In summertime, identifies and warns when conditions for mold growth exist
  • In wintertime, identifies and warns when low humidity conditions for static electricity exist
  • Remote probe allows for measurements behind walls or in difficult to access locations
  • Air temperature and dew point temperature indicate where condensation may occur
  • Monitor conditions in laboratories, storage areas and other controlled environment settings
  • Ideal solution when traceable ISO calibrations are required by operating standards
Ordering Information
Model Description Buy Online Price
445815 Extech 445815 Hygro-Thermometer with Dew Point Buy Now Sale $36.95
(Reg. $55.99)
445815-NIST Extech 445815-NIST Humidity Alert II Hygro-Thermometer w/DP w/NIST Certificate Buy Now Sale $159.27
(Reg. $180.99)
445815-NISTL Extech 445815-NISTL, 445815 w/Limited NIST - Single Point Buy Now Sale $115.27
(Reg. $130.99)
Included Accessories
  • 1 - Built-in stand
  • 1 - Wall mount bracket
  • 2 - AAA batteries
Optional Accessories
RH300-CAL Extech RH300-CAL, Humidity Solution Kit, 33% and 75% Buy Now Sale $43.79
(Reg. $59.99)

*NOTE: Items ordered with optional NIST calibration will require
approximately 10 days to complete the certification.