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Extech 445814 Stationary Hygro Thermometer Psychrometer with Audible Humidity Alert | 
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| Brand: Extech
Category: Home Improvement
Buy New: Too low to display
New (7)
Avg. Customer Rating:  6 reviews
Sales Rank: 1990
Media: Tools & Hardware
Batteries: 2
Batteries Included: Yes
Shipping Weight (lbs): 0.5
Dimensions (in): 3.1 x 1.9 x 9
MPN: 445814
Model: 445814
UPC: 793950458143
EAN: 0793950458143
ASIN: B000BF0ZTU
Shipping: Eligible for Super Saver Shipping
Promotion: Save $10.00 when you spend $50.00 or more on Qualifying Items offered by Amazon.com. Enter code BMLTOOLS at checkout. Terms and Conditions
Availability: Usually ships in 24 hours
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| Features:
| • | Large triple display of relative humidity, temperature and dew point | | • | Alarm with programmable set point gives visual and audible warning when humidity level exceeds high or low limit | | • | Built-in stand for sitting on a desk or mount on a wall using included bracket | | • | Recalls minimum and maximum readings | | • | Ideal monitoring device in humid areas where mold can be a problem |
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| Accessories:
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| Editorial Reviews:
Product Description
HUMIDITY ALERT, BIG DIGIT RH, TEMP, DEW POINT
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| Customer Reviews: Read 1 more reviews...
 Dew point display is helpful July 13, 2008
Dew point display was the feature that made me buy this product. It has worked well, has a long battery life, and is accurate. The dew point shows how much humidity I can safely add in the winter without condensation forming on the windows. It also indicates the efficiency of the air conditioner in the summer. "Delta T" (the change in temperature, the temperature of the intake air minus the temperature of the chilled air) shows how much heat the air conditioner is removing. Since the a/c also removes moisture, the dew point tends to be the same as the evaporator plates, which is the temperature of the chilled air. (Unless you live in a dry climate.) So, just noting the difference between the ambient air and dew point indicates the efficiency. It is amazing how much more efficient the a/c is in the morning, when the outside temperature is in the 70s versus how little chilling happens in the afternoon in the 90s. I quit running the a/c in the mid afternoon, and save a few buck on the electricity. It is a fine product. Spread the word about the dew point!
Extech Satisfaction April 28, 2008
The Extech unit I purchased to check humidity, temperature and dew point is very accurate and functional. Would buy another.
 Innacurate Humidity Reading, Calibration Does Not Work April 20, 2008
2 out of 2 found this review helpful
I compared this unit with a "Western Humidor Caliber III" hygrometer which I had tested in a controlled environment (75.5% Humidipak Calibration Kit). The Caliber III unit was dead-on which surprised me since I only paid $20 for that. The Extech was off by between 8% to 10%. The Extech has a calibration screw in the back so I tried calibrating it to match my other hygrometer but the screw doesnt even do anything!!! It just pointlessly TURNS! The temperature however was accurate. FINAL THOUGHTS: I'm buying another Caliber III Hygrometer and returning this one. The Caliber III is accurate within 1% Relative Humidity.
Extech Hydro Thermometer August 23, 2007
1 out of 3 found this review helpful
I found the product to be exactly what it was suppose to be. It has helped us to determin how and what settings to but A/C and Heat settings for the area we are needing to moniter. I would recomend this product to anyone needing accurate information of Humity,tempeture and Dew point to an area. We use ours for our research labs that need to have a controled atmosphere,this product allowes us to know first hand if the lasers are in the inviroment needed for 100% efficency.....Very Pleased with this purchase....Thank You Amazon.Com.....Dennis
A good 'tool' to have..... June 26, 2007
1 out of 2 found this review helpful
A good way to keep an eye on humidity and temp...now I know the difference an open window makes in raising the humidity in the basement....(I seen it as much as 15%) It displays the same temp and humidity within a few degrees of my dehumidifier...so now I can trust the readings of that unit.
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