Extech 445703 Digital Humidity & Temperature Monitor
Up to a 99% Accuracy Rate


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Extech Instruments 445703 Hygro-Thermometer
Availability: Out of Stock
List Price: $ 59.99
Price Break: $17.00
Our Price: $42.99
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We want your business! To do this we offer full 30 day NO-WORRY RETURNS so you can order with confidence! We also ship most orders the same day since we actually warehouse our products unlike our competitors. And if you have any questions we have real people to talk to!


Stay aware of changing humidity and temperatures in you immediate environment with Extech's 445703 digital home Hygro-Thermometer.  Convenient and portable this is a reliable thermometer that helps you get can accurate reading every time.

The 445703 is the best way consistently monitor immediate changes in your environment.  Is easy to setup, operate and even comes with batteries for immediate use. A large, easy-to-read LCD display, lets you so you can check accurate atmospheric conditions with a mere glance. Purchase the  Extech 445703 digital home Hygro-Thermometer and get easy and accurate readings today.


  • Model: 445703
  • Product Type: Hygro-Thermometer
  • Product Dimensions: 0.78" x 3.90" x 4.30"
  • Product Weight: 1.00 lbs.
  • Product Color: Green
  • Application: Ideal for monitoring the humidity and temperature in your immediate environment
  • Certifications: CE
  • Display Type: LCD
  • Temperature Range: 14° -140° F
  • Humidity Range: 10-85% RH
  • Includes Batteries: Yes
  • Low Battery Indicator: Yes
  • Accuracy Percentage: 5
  • Audible Alarm: No
  • Visual Alarm: No
  • Dew Point Temperature Display: No
  • Programmable: No


  • Hygro-Thermometer electronically monitors both humidity and temperature
  • Memory with reset function to store measurements
  • Portable, so you can take it anywhere
  • Reads both Celsius and Fahrenheit
  • Up to 99% accuracy
  • User-friendly design for easy assembly
  • Large display so you can read it easily

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Real Customer Testimonials

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Name: R. A. Dovve
Date: 12/16/2010
Location: Akron, OH
Overall Rating:

Review Title: HygroThermometer -- 445703
Comments: Unit appearance was quite attractive. However, directly after activating the unit with the addition of the batteries I was alarmed because the temperature read-out was about 10 degrees too high. If it can't display the right temp then how inaccurate the Rel Humidity must be. Finally in desperation I set the unit on my desk and pondered the situation. Eureka! The temp was right on the money. Heat from my hands had caused the aberration. I couldn't be more pleased with the performance of my unit. I highly recommend it. Perhaps a caveat should be added to your literature: Avoid bias that can be introduced by inadvertent bodily contact.
Recommend to Friend: Yes
Name: G. Goese
Date: 11/11/2010
Location: Fergus Falls, MN
Overall Rating:

Review Title: Works just fine.
Comments: We purchased this instrument to verify that the humidifier we added to our furnace was working. Both are working just fine, thank you.
Recommend to Friend: Yes
Name: Dennis
Date: 07/23/2010
Location: Saline, MI
Overall Rating:

Comments: We are pleased so far with this product and it seems to be working well for us. Your service was great and delivery was received when expected.
Recommend to Friend: Yes
Name: Klaus
Date: 06/10/2010
Location: Palm Bay, FL
Overall Rating:

Review Title: Extech Hygro Thermometer
Comments: I ordered the instrument to monitor the Relative Humidity in my condominium. My home is located on a laguna at the balcony side and ocean view at the entrance door side. During the spring and fall seasons when balm weather prevails I like to open my place for cross ventilation. Some days, however, I encounter high relative humidity, up to 90% RH, outdoors. That is the time when I should close my openings and switch on my air conditioning (sometimes combined with my de humidifier to lower the RH in my condominium and avoid growth of mold and mildew. As I did not know the accuracy of the Hygrometer portion of the Extech instrument, I tested it outside during a long day of pouring tropical rain. It indicated 92 percent relative humidity, which is very accurate. Inside the condominium the temperature indication stays within one degree of the indicator of my thermostat for the air conditioning unit. I am very happy with the accuracy of the HygroThermometer. It exceeds the expectations I had.
Recommend to Friend: Yes
Name: Claud
Date: 05/25/2010
Location: Westborough, MA
Overall Rating:

Review Title: Satisfied
Comments: I am pleased with the performance of the Hygro Thermometer. I find it accurate and a great help to me to know the temperature before I venture out for I am 85 years old and chill quickly. I did find that set-up was a bit of a challenge but got through it.
Recommend to Friend: Yes
Name: B. Grossman
Date: 03/11/2008
Location: Union Springs, NY
Overall Rating: