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  • Extech 45158 Mini Waterproof Thermo Anemometer and Humidity Meter
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Extech 45158 Mini Waterproof Thermo Anemometer and Humidity Meter

by Extech

Price: $117.38 & FREE Shipping. Details
Only 9 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
  • Pocket design meter with flip style case acts as extension handle and protects meter during storage
  • Displays air velocity and either relative humidity, dew point or temperature on dual display
  • Measuring range 100 to 5500feet/min
  • Choice of readings in feet/min, meters/second, kM/hour, MPH or knots
  • Rugged water resistant housing floats
See more product details
15 new from $112.00 1 used from $100.00

Woodworking Essentials Woodworking Essentials

$117.38 & FREE Shipping. Details Only 9 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

Extech 45158 Mini Waterproof Thermo Anemometer and Humidity Meter + Extech 407730 40-to-130-Decibel Digital Sound Level Meter
Price for both: $185.53

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  • Buy Used and Save: Buy a Used "Extech 45158 Mini Waterproof Thermo Anemometer and..." and save 35% off the $154.99 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

Product Information

Technical Details
Part Number 45158
Item Weight4.8 ounces
Product Dimensions5.5 x 2.8 x 0.8 inches
Item model number45158
Batteries:1 CR2 batteries required. (included)
MaterialPlastic
Item Package Quantity1
Batteries Included?Yes
Batteries Required?Yes
Warranty Description1 year
  
Technical Specification
Additional Information
ASINB00023RVRU
Best Sellers Rank #84,351 in Home Improvement (See top 100)
Shipping Weight4.8 ounces (View shipping rates and policies)
ShippingCurrently, item can be shipped only within the U.S.
Date First AvailableApril 20, 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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Product Description

Waterproof Mini Thermo-Anemometer + Humidity

Model 45158 packs a lot of capability into a pocket size meter that displays air velocity plus temperature or air velocity plus relative humidity on a large, dual display LCD.

Features & Functions Overview

Wind speed values are displayed in six different units (feet/minute, meters/second, kilometers/hour, miles/hour, knots, and Beaufort) with +3% accuracy. Averaging for 2, 5, or 10-second intervals can be selected. Besides air velocity, it also measures wind chill plus relative humidity, and dew point. Additional Functions: Other features include Data Hold to freeze the most recent display, and Auto Power Off to preserve battery life. The 5-1/4" meter folds into a water-resistant housing that is designed to float and when the cover is open. The meter extends to 9" for reaching into openings. You’ll want to carry it with you whether you are on the job as an HVAC or plant maintenance technician or involved in recreational sports.

Inside The Box

  • CR2032 battery
  • 43" (1.09m) lanyard
  • User manual

Applications

  • HVAC installation, repair, diagnostics, and optimization
  • Positive pressure tests in clean rooms
  • Fume hood testing, installation, and verification
  • Automobile engines analysis, passenger compartment tests, and aerodynamic testing
  • Ionizer flow output monitoring
  • Ventilation system installation, servicing, and analysis
  • Environmental wind and temperature testing/analysis
  • Boiler rooms
  • Plant/Facilities Maintenance
How Does An Anemometer Measure Moving Air?

Anemometers measure moving air with a rotary sensor that acts very much like a weathervane and can be likened to the blades of a fan. The vane freely rotates in response to airflow, and as the air moves through the vane the blades turn in proportion to the speed of the air.

What Is CFM / CMM?

Cubic Feet per Minute (CFM) or Cubic Meters per Minute (CMM) are units of measure for air volume measurements. This is a measurement of the quantity of moving air through an air duct, passageway, or enclosure. In order to determine this, the area of the duct must be measured. The area value (in ft2 or m2) is entered by the user, by pushbutton or keypad into the meter and an air velocity is determined.

Related Products

45118
Waterproof Mini Thermo-Anemometer

Waterproof pocket size anemometer simultaneously displays Air Velocity and Temperature or Wind chill. Units of measure for Air Velocity include: ft/min, m/s, km/h, MPH, knots, and Beaufort Force. Selectable averaging function of 5, 10, or 13-second intervals. Fold-up protective housing extends to 9" for better reach. Data Hold with Auto Power Off. Tripod mount. Water-resistant housing floats. Includes CR2032 lithium battery and 43" (1.09m) lanyard. Accessories include: Replaceable plastic vane impeller (45156). Package of two.

AN25
Heat Index Anemometer

Monitor Heat Index on hot humid days to prevent heat stroke during outdoor activities, sporting events, or in the workplace. Heat Index measures how hot it feels when Humidity is combined with temperature, air movement, and radiant heat. Wet Bulb Globe Temperature (WBGT) considers the effects of temperature, humidity, and direct or radiant sunlight. The AN25 measures Air Velocity in feet/min., meters/sec., MPH, kilometers/hour, and knots, Heat Index, WGBT, Humidity, Temperature, Dew Point, and Wet Bulb. Additional features include: Min/Max/Average (5sec/10sec/13sec), readout in °F/°C, Data Hold, and Auto power off with disable. Complete with CR2032 battery.

AN10
Pocket Anemometer

Convenient pocket-sized meter is easy to use and easy to stow. Keep one handy for whenever you need to take a quick environmental measurement. Measures air velocity in ft/min, m/s, km/h, MPH, and knots. It features a large automatic backlit LCD display when meter is powered on, durable double molded side grip, and a tripod mount (optional TR100 tripod). Complete with 9V battery.


Customer Questions & Answers

Customer Reviews

4.1 out of 5 stars
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Most Helpful Customer Reviews

10 of 12 people found the following review helpful By Christopher Lloyd on April 8, 2007
Verified Purchase
This thermo-anemometer gave surprisingly accurate relative humidity readings. However, it's impossible to get it to provide temperature readings as well. Additionally, the 'slide-in-slide-out' feature leaves some pretty nasty scratches on the unit during field use.
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3 of 3 people found the following review helpful By Todd Shipp on October 4, 2008
Verified Purchase
The instruction "page" is difficult to figure out exactly how to use this device. After trial and error, it is working as described. I'm not happy with the slow response to wind changes but I guess I don't need to know the wind chaging from 3mph to 3.5mph as fast as I thought.
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1 of 1 people found the following review helpful By Kenneth Walker on July 27, 2013
Verified Purchase
Trying to balance our ducted ventilation system is impossible without some real indication of velocity. This unit is intelligently designed for use in the real world. We use it as a relative indicator and don't have it on our calibration system. It works well for us. The folding feature adequately protects it for normal use up and down ladders.
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1 of 1 people found the following review helpful By wise1owl on August 10, 2010
Verified Purchase
I bought this unit for use as a portable thermometer and dew point meter with reasonable accuracy. I is self contained, reasonably accurate, and measures temperature, dew point, relative, humidity, wet bulb temperature, and wind/air speed.

I heartily reccomend it for anyone that needs a quick, simple method for measuring any on the above.
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1 of 1 people found the following review helpful By BreezeGirl on June 17, 2013
Verified Purchase
This worked well the first season we had it. However, it was stored in my husband's pick up truck and the Florida heat melted it. Yes, MELTED it. Bummer.
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Verified Purchase
I am a PE doing building inspections. This combination instrument provides air flow, temperature, RH data that is easy to read. If you use instruments occasionally like I do and not everyday, you will find this is a good value for your money. Take care to not damage it as the senors are vulnerable and keep closed when not in use.
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Extech 45158 Mini Waterproof Thermo Anemometer and Humidity Meter
This item: Extech 45158 Mini Waterproof Thermo Anemometer and Humidity Meter
Price: $154.99 $117.38
Ships from and sold by Amazon.com