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Extech 44550 Pocket Humidity/Temperature Pen

3.6 out of 5 stars 31 customer reviews

Price: $33.99 & FREE Shipping—or get FREE Two-Day Shipping with Amazon Prime
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  • Built-in sensors provide simultaneous readings of relative humidity and temperature
  • Humidity: 20 to 90-percentRH (±5-percentRH)
  • Temperature: 14 to 122-Degrees F or-10 to 50-Degrees C
  • Simple operation
  • Max/Min with "Clear" function
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$33.99 & FREE Shipping—or get FREE Two-Day Shipping with Amazon Prime In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently bought together

  • Extech 44550 Pocket Humidity/Temperature Pen
  • +
  • Extech 445580 Humidity and Temperature Pen Sized Meter with Pocket Clip
  • +
  • Extech MO55 Combination Pin/Pinless Moisture Meter
Total price: $178.82
Buy the selected items together


From the manufacturer

Multipurpose Device with Numerous Applications

Ensure that food is stored in proper conditions to prevent mold growth and spoilage by checking the humidity and temperature of cold storage, pantries, etc.

Food Safety

Environmental conditions

Working conditions

Product description

Pen displays relative humidity and temperature simultaneously. Min/max function displays and holds the maximum humidity and temperature values since power-up in memory; simply press the clear button to reset. Featuring an on/off button, and selectable °F/°C temperature. Pocket size with quick and reliable measurements


Product information

Technical Details

Technical Specification

Additional Information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Customer reviews

Top customer reviews

on December 2, 2016
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on July 16, 2017
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on April 10, 2010
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on December 27, 2013
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The manufacturer commented on the review below
on November 10, 2015
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The manufacturer commented on this review (What's this?)
Hello Mike,
Thank You for your post regarding the 445580Temp/RH pen. I am sorry to see that yours was not working properly. I apologize for the frustration this caused you. I am happy to arrange a tested replacement for you. If you would email me at feedback@extech.com, I would be happy to make the necessary arrangements.

Best Regards,
Jamie Cohen
Product Support Manager
Extech Instruments
FLIR Test
on September 11, 2017
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The manufacturer commented on the review below
on December 5, 2014
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The manufacturer commented on this review (What's this?)
Hello Michael,
It appears that you have a defective 44550Thermometer. My apologies, I am sure this is frustrating for you. I would be happy to arrange a tested replacement unit for you. if you would email your contact information to me at feedback@extech.com, I can make the needed arrangements.

Best Regards,
Jamie Cohen
Product Support Manager
Extech Instruments.
on January 4, 2017
Verified Purchase
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