Extech RH/Temperature Pen 445580

Data rich readings of temperature (°C/°F) and relative humidity on a twin LCD display

The Extech RH/Temperature Pen is compact and easy to use, giving you a digital hygro-thermometer that has a dual LCD display, measuring temperature and relative humidity simultaneously.

It also offers maximum, minimum, and data hold functions for both readings, and the system comes complete with a functional pocket clip and 3-Volt lithium battery.


  • Data rich readings of temperature (°C/°F) and relative humidity on a twin LCD display
  • Max/Min memory functions for temperature and RH
  • Data Hold function for freezing the LCD display variables
  • Includes meter with pocket clip for easy storage and 3V lithium battery


% Relative Humidity Range 10 to 90%
Temperature Range 32 to 122°F (0 to 50°C)
Power One lithium battery
Dimensions 5.7" H x 1.2" W x 1" D
Weight 2.3 oz (65g)

NIST Calibration

The Extech RH/Temperature Pen 445580 is available with standard factory calibration or with NIST Calibration Certification (adds 5 days to product lead time). NIST certification offers a traceable certificate that satisfies ISO & other regulatory requirements for product accuracy traceability to nationally recognized reference standards.

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This product comes standard with a 1-year warranty.

Return Information

  • Return windows close 30 days after you receive your item.
  • You are responsible for obtaining a Return Merchandise Authorization, the cost of shipping, and potential restocking fees, if the item has been opened.
  • To start a return, or to view the full returns policy, click here.
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Ships Free (US 48)
Ships in 2-3 weeks

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