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Extech 445715 Big Digit Hygro-Thermometer

by Extech
| 16 answered questions

List Price: $55.99
Price: $40.72 & FREE Shipping. Details
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In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Standard
  • Humidity: 10 to 99% RH
  • Temperature: 14 to 140°F (-10 to 60°C)
  • Accuracy: ±4%RH; ±1°C/1.8°F
  • Max/Min with reset function
  • Complete with built-in stand, mounting bracket, sensor, and 1 AAA battery; optional calibration salt bottles
  • Product color is very dark green and white
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$40.72 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

Extech 445715 Big Digit Hygro-Thermometer + Boveda One-Step Hygrometer Calibration Kit - 75% RH - Standard Small
Price for both: $48.69

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Special Offers and Product Promotions

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  • Save 20% on 1 FLIR Father's Day BXGY offered by Amazon.com when you purchase 1 or more. Here's how (restrictions apply)

Technical Details

Style: Standard
  • Portable

Product Description

Style: Standard

Extech 445715 Big Digit Hygro-Thermometer

Big Digit Hygro-Thermometer

Ideal for maintaining proper temperature and humidity conditions in factories, warehouses, document storage, office buildings, and other locations, the Extech 445715 Big Digit Remote Probe Hygro-Thermometer can also record extremes in temperature during the day. Featuring a dual display with large 1-inch digits, the 445715 provides simultaneous display of humidity level and temperature.

Additional Features

The 445715 includes a memory with reset function that stores both maximum and minimum measurements. It has a temperature range of 14 degrees to 140 degrees F, and a humidity range of 10 to 99 percent RH. This thermometer is accurate to 1.8 degrees F and 6 percent RH with switchable Fahrenheit and Celsius readout. The unit can be calibrated using the optional calibration salt bottles (RH300-CAL Humidity Calibration Kit).

What's in the Box

Comes complete with sensor probe with 18-inch cable, built-in tilt stand, wall mount bracket, AAA battery, and user guide. The 445715 Hygro-Thermometer is also available with an optional Certificate of Traceablitity to NIST at 2 points (33 and 75 percent), or Limited Traceability to 1 point (75 percent). Please note that the product color is very dark green and white.



Product Information

Style Name: Standard
Technical Details
Part Number 445715
Item Weight6.4 ounces
Product Dimensions9.2 x 5.5 x 1.2 inches
Item model number445715
Batteries:1 AAA batteries required. (included)
ColorProduct color: Very Dark Green
StyleStandard
Item Package Quantity1
Special FeaturesPortable
Batteries Included?Yes
Batteries Required?Yes
Warranty Description1 Year
  
Additional Information
ASINB000NI4AQY
Best Sellers Rank #3,071 in Home Improvement (See top 100)
Shipping Weight6.4 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First AvailableSeptember 1, 2004
  
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 Questions & Answers

Customer Reviews

4.5 out of 5 stars

Most Helpful Customer Reviews

50 of 53 people found the following review helpful By Citizen John TOP 500 REVIEWERVINE VOICE on December 28, 2012
Style Name: Standard Verified Purchase
This is the most inexpensive device of its kind on Amazon - a guaranteed accurate hygro-thermometer. The outside sensor in the product photo is attached to a small cylinder-shaped arm affixed to the side of the unit.

All the twenty dollar type units that provide temperature and humidity levels will generally be in the correct range yet not with precision. Notice how the diligent reviewers of those cheap units cite comparisons with various hygro-thermometers to each other. In those citations, cheap units don't agree and it's impossible to know which is more correct.

Better to get one accurate unit and if needed, compare the others against it. This unit is accurate - guaranteed per the product description. The sensor is always on the outside of highly accurate units, and normally such units cost even more than this one.

My experience with this unit is positive. It's more accurate than the temperature gauges in my house that control heating and cooling, for example. I don't bother with other humidity reporting units because cheaper ones are notoriously inaccurate.

Extech makes many high-tech measuring devices, especially multimeters. The company is well-known to house inspectors and electricians.
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16 of 16 people found the following review helpful By KC Man on November 21, 2014
Style Name: Standard Verified Purchase
This was extremely accurate out of the box. The temperature was accurate to .1 degree, with reference to a high end Netatmo unit. The humidity was off by 4%, which is within the mfg. specs. I was able to calibrate it to 100% accuracy using a Boveda One Step Kit.

The surprising thing is how responsive this thing is. Just getting near it will change the readings, virtually instantly, no lag time. I think the fact this has an exterior sensor makes it far more responsive than one which is built into the unit, which many are.

A note on the picture. It looks much larger than it is, which is 4.25"x4", I wanted to show detail so I got in close.
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15 of 16 people found the following review helpful By S. Cole on November 16, 2013
Style Name: Standard Verified Purchase
Awesome! I have a Fluke 971 professional handheld Temp & Humid meter. They are within 1% of each other. Cough-up the extra money and buy it, you’ll love it!
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10 of 10 people found the following review helpful By robert corder on March 31, 2014
Style Name: Standard Verified Purchase
This is one of those rare things where I found that the extra expense was WAY worth it. Saw one at Walmart for $9.00 (out of stock, of course) so I went online and got this, thinking I could return it anyway. I will not give it up now. This is a large and very accurate item and I found the instruction manual very interesting. After using this, I went and got a humidifier for the winter heating seasons. No more dry nose, etc.. I don't generally write reviews, but this is an exception. For me, this purchase was an unexpected home run. Note: get the exact one with the right order #; there's a cheaper one you don't want. See the other reviews for why.
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11 of 12 people found the following review helpful By Chuck R on August 21, 2013
Style Name: Standard Verified Purchase
I've owned this for about 6 months now and I am happy with it, mine seems to be accurate. I wanted to monitor humidity levels in my house, they get very low in the winter when the heat is on. I recently had trouble with mold in my workshop this summer so now I am concerned about mold starting in the house so I am buying another one to monitor the bathroom area and one for a common living area. I am also concerned about air circulation so if I have proper circulation the two meters should balance out sometime after a shower. As someone else commented, the cheap units are very inaccurate on humidity readings so if it's important you better buy a good one even though the cost hurts a little.
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7 of 8 people found the following review helpful By MK on May 7, 2013
Style Name: Standard Verified Purchase
I use this with a drying chamber for sausage and such. It seems a little pricey; however, it has worked very well for me. It has been very accurate with temperature and humidity which is critical since the chamber must maintain a consistent range on both. It also offers a max and min function for both temp and humidity that is easy to reset whenever you like. This is very useful if you wish to get the average temp/humidity to help make sure you are keepin' it where ya want. If it didn't cost so much, I would give it 5 stars. I recommend it and would buy it again.
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The manufacturer commented on the review below
2 of 2 people found the following review helpful By Scott Campbell on January 9, 2015
Style Name: Standard Verified Purchase
At first, I was impressed by the nice display, external sensor, and intuitive operation. The humidity reading seemed to be accurate at first, but after about six weeks, I question how I could have 22% humidity in a bathroom with the shower running long enough to cause condensation on the mirror. My display always reads between 22 and 24% humidity regardless of the conditions. This unit is trash.

Update (2015-01-25):

I returned the original unit to Amazon and Extech sent a replacement. This one is accurate as measured by three other models. The display is large enough that I can read it easily from across the room. I use this in addition to a humidifier to determine how accurately the automatic settings on my humidifier control humidity levels throughout the house. I'm happy with the product and also the support I received.
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The manufacturer commented on this review(What's this?)
Hi Scott,
Thank you for your review of the 445715 Hygro-thermometer. I am sorry that the unit has failed on you so quickly. I apologize for the obvious frustration this has caused you. I would like to send you a tested replacement unit. If you would forward your contact information to feedback@extech.com, I can make the needed arrangements.

Best Regards,
Jamie Cohen
Product Support Manager
Extech Instruments
3 of 3 people found the following review helpful By scott siegner on April 17, 2013
Style Name: Standard Verified Purchase
the temperature reading is off by 5-8 degrees, the hygrometer seems to be functioning fine though. I would not recommend this item.
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Extech 445715 Big Digit Hygro-Thermometer
This item: Extech 445715 Big Digit Hygro-Thermometer
Price: $40.72
Ships from and sold by Amazon.com