Mold Inspection Consulting and Remediation Organization
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Extech 445580 Humidity/Temperature Pen

Compact, digital Hygro-Thermometer. Ideal for field use.

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Extech 445580 Humidity/Temperature Pen
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  • Extech 445580 Humidity/Temperature Pen

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    Item #461

Take this this handy humidity and temperature gauge on the go and rely on a long-lasting 3V lithium battery for maximum usage time. This slim measuring tool will capture humidity readings from 10 to 90% RH and register temperatures from 14° to 122° (-10 degrees to 50°). It’s an ideal tool for field work and a nice accoutrement for outdoor lovers.

This utility tool will store maximum and minimum readings until the memory is cleared and includes a data-hold button for rapidly fluctuating measurements. Includes meter with pocket clip and 3V lithium battery.


  • Dual LCD display for Temperature, Humidity,
    and advanced function indication
  • Measures Temperature (°C/°F) and Relative Humidity simultaneously
  • Built-in Temperature and Humidity sensors for convenient operation
  • Max/Min memory functions for both Temperature & Relative Humidity
  • Built-in self calibration utility with optional RH calibration bottles
  • Data Hold for freezing the LCD display status
  • Complete with pocket clip and 3V lithium battery
  • Optional kit includes 33% and 75% RH
  • Calibration Standards and hard vinyl carrying case


Specifications % Relative Humidity Temperature
Range 10 to 90% 14 to 122°F (-10 to 50°C)
Basic accuracy ± 5% ±1.8°F/1°C
Resolution 0.1%RH 0.1°C or °F
Power One lithium battery (CR2032)
Dimensions 5.7x 1.2 x 1" (145 x 30 x 25mm)
Weight 2.3 oz.(65g)