--- product_id: 150156623 title: "BTMETER 866A Pro Handheld HVAC Anemometer CFM Air Flow Meter(Wet Bulb Temp)" brand: "btmeter" price: "NZ$198" currency: NZD in_stock: true reviews_count: 13 category: "Btmeter" url: https://www.desertcart.nz/products/150156623-btmeter-866a-pro-handheld-hvac-anemometer-cfm-air-flow-meter store_origin: NZ region: New Zealand --- # USB data sync & logging for real-time PC analysis Measures wind speed up to 40 m/s with ±2% accuracy 0.01 m/s resolution ultra-sensitive wind sensor BTMETER 866A Pro Handheld HVAC Anemometer CFM Air Flow Meter(Wet Bulb Temp) **Brand:** btmeter **Price:** NZ$198 **Availability:** ✅ In Stock ## Summary > 🌪️ Own the airflow, master the environment—because precision is power. ## Quick Answers - **What is this?** BTMETER 866A Pro Handheld HVAC Anemometer CFM Air Flow Meter(Wet Bulb Temp) by btmeter - **How much does it cost?** NZ$198 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/150156623-btmeter-866a-pro-handheld-hvac-anemometer-cfm-air-flow-meter) ## Best For - btmeter enthusiasts ## Why This Product - Trusted btmeter brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Portable Powerhouse:** Compact, rugged ABS design with backlit display, tripod mount, and auto shut-off—engineered for on-the-go pros balancing airflow indoors or out. - • **Seamless Data Syncing:** Connect effortlessly via USB to your PC for live monitoring, logging, and deep HVAC system insights—your digital airflow command center. - • **Multi-Unit Versatility:** Switch between 6 wind speed units and dual temperature scales (°C/°F) for tailored, professional-grade measurements anywhere. - • **Precision Airflow Mastery:** Pinpoint wind velocity from a whisper to a gale with 0.01 m/s resolution and ±2% accuracy—no guesswork, just data. - • **Humidity & Dew Point Insight:** Integrated %RH and dew point readings help you diagnose moisture issues before they become costly problems—stay ahead of the curve. ## Overview The BTMETER 866A Pro is a handheld HVAC anemometer engineered for professionals demanding precise airflow, temperature, and humidity data. Featuring ultra-sensitive 8-vane sensors with 0.01 m/s resolution and ±2% accuracy, it measures wind speed up to 40 m/s across 6 units, plus wet bulb temperature and dew point. USB connectivity enables real-time data logging and analysis on PC, while its compact, rugged design with backlit LCD and tripod mount ensures versatile, portable use. Ideal for HVAC balancing, duct testing, and environmental diagnostics, it empowers users to optimize airflow and prevent moisture-related issues with confidence. ## Description desertcart.com : BTMETER 866A Pro Handheld HVAC Anemometer CFM Air Flow Meter(Wet Bulb Temp) | Wind Meter Gauge Measures Wind Velocity Temp %RH Dew Point with USB Sync to PC, 6 Wind Speed Units, ±2% Accuracy, LCD Backlit : Patio, Lawn & Garden Review: Great and accurate hand held air flow meter! A+A+A+A - I specifically used this device to measure air flow from the heater vent registers in my home. Readings were very accurate an greatly assisted in determining resister issues. It is excellent that it uploads data to your computer for real-time display and recording. The carrying is also a big plus. Review: Answers to exhaust flow questions - We wondered why we were seeing mildew in our bathroom. This was the measurement tool to give us the answers. It turns out that our bathroom exhaust fan woefully inadequate for pulling moisture from the shower. The same day that this meter arrived we determined a) the fan was working at the flow rate advertised and b) desertcart would sell us a replacement fan with much higher flow. Problem fixed after one more desertcart package. Note you might have to do a little cardboard, scissors, and duct tape work to match the meter to the vent. ## Features - ★【Wind Data Sync on Computer】 This wind velocity meter can measure Wind Speed, wind temperature, wind flow, relative humidity(%RH) and dew point, provides Max / Min of wind velocity reading to balancing the HVAC system. Built with sensitive 8 vanes to pick up slow winds down to 0.01 resolution. Comes with a USB cable and PC software for wind data logging, analysis and monitoring. - ★【High Accurate HVAC CFM Meter】Measures high Wind Velocity range 0.3~40 m/s, +/- 2.0% + 50, display in 6 units: m/s, km/h, ft/min, knots, mph, fpm; Wind Temp Range 14°F～140°F, +/- 2.7 °F display in 2 units ℃℉(Celsius,Fahrenheit); Air flow vlume range 0~999900 ft3/min. 💖Smart anemometer display air flow velocity and CFM reading directly, no more manual calculation💖 - ★【USB Data Logging】With a metal screw hole in the bottom so you can mount it on a tripod for hands-free operation. Support to connect the wind meter to computer via USB port, for monitor and record wind speeds, temperature, CFM air flow and RH, perfect for balancing air flow in HVAC tasks such as: duct vents, AC air output testing - ★【Portable Anemometer】 It’s a handheld pocket size wind speed indicator comes with protective case, Large Backlit screen, Low battery indicator and auto shut down to save the battery. Portable for indoor and outdoor wind measurements,such as: Long range shooting,Boat Sailing, Kite flying, Climbing, Drone driving,Vent, turbine air flow testing etc. - ★【Tips for Wind Temp %RH Testing 】 The temperature sensors are inside the left and right holes, to shade them from sunlight to assure the wind reading are for the air flowing through the holes. So without air flow, the temp and %RH reading WON’T change rapidly, they’ll change slowly. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07RXHFF8G | | Best Sellers Rank | #96,583 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #24 in Wind Speed Gauges | | Brand | BTMETER | | Brand Name | BTMETER | | Customer Reviews | 3.9 out of 5 stars 210 Reviews | | Included Components | 1* Por CFM Anemometer and 1* User manual | | Item Dimensions | 3.5 x 1.5 x 6.5 inches | | Item Highlight | Wind Meter Gauge Measures Wind Velocity Temp %RH Dew Point with USB Sync to PC, 6 Wind Speed Units, ±2% Accuracy, LCD Backlit Item Highlight Wind Meter Gauge Measures Wind Velocity Temp %RH Dew Point with USB Sync to PC, 6 Wind Speed Units, ±2% Accuracy, LCD Backlit See more | | Item Weight | 200 g | | Item dimensions L x W x H | 3.5 x 1.5 x 6.5 inches | | Manufacturer | BTMETER | | Material | Acrylonitrile Butadiene Styrene (ABS) | | Material Type | Acrylonitrile Butadiene Styrene (ABS) | | Model | BT-866A | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | Wind Gauge for HVAC CFM Calculation | | UPC | 778469100936 | | Unit Count | 1 Count | | Warranty Description | 1 Year | ## Product Details - **Brand:** BTMETER - **Item Weight:** 200 g - **Item dimensions L x W x H:** 3.5 x 1.5 x 6.5 inches - **Material:** Acrylonitrile Butadiene Styrene (ABS) ## Images ![BTMETER 866A Pro Handheld HVAC Anemometer CFM Air Flow Meter(Wet Bulb Temp) - Image 1](https://m.media-amazon.com/images/I/71T8kC+Hz-S.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Does anyone know a link to download the software to us it with a pc? the product comes with a cd but we do not have laptops with cd readers anymore.** A: Hi, thanks for asking. You can download the software in http://dwz.win/Yry Please feel free to contact BT@BESTMETER.CN for any further question **Q: What is the data rate to the pc? I need readings at least every .1 seconds.** A: The sampling rate can be set from 0.5 seconds per time to 1 minute per time. Of course, include 1 second per time **Q: Is the software compatible with Windows 10? Android?** A: Hi, thanks for asking. BT-866A anemometer is compatible with Windows as well as IOS computer,including windows 10. But not Andriod or any phone. **Q: Does the device only transmit live data to the compute. Do I have to take the compute outside and tether it to the laptop in order to record outside?** A: yes mine did. was a cheap bag. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great and accurate hand held air flow meter! A+A+A+A *by A***Y on February 14, 2021* I specifically used this device to measure air flow from the heater vent registers in my home. Readings were very accurate an greatly assisted in determining resister issues. It is excellent that it uploads data to your computer for real-time display and recording. The carrying is also a big plus. ### ⭐⭐⭐⭐⭐ Answers to exhaust flow questions *by C***Y on April 14, 2025* We wondered why we were seeing mildew in our bathroom. This was the measurement tool to give us the answers. It turns out that our bathroom exhaust fan woefully inadequate for pulling moisture from the shower. The same day that this meter arrived we determined a) the fan was working at the flow rate advertised and b) Amazon would sell us a replacement fan with much higher flow. Problem fixed after one more Amazon package. Note you might have to do a little cardboard, scissors, and duct tape work to match the meter to the vent. ### ⭐⭐⭐⭐ USB connection *by P***L on April 29, 2021* First, the USB connection does NOT power the meter, so if you are going to do long term logging, your battery may die! WHY doesn't the USB power the meter???? What is so difficult to accomplish this? Second, from the videos I have seen and the one that I received, the fan is NOT balanced and has a heavy side. This would affect low air speed measurements! I screwed around with some weights to get the blade somewhat balanced but it is still a little off. Not worth returning because I would just get the same thing. Why is producing a balanced fan so hard???? Just shows how cheaply made this is! Also, does NOT do averaging... ONLY min/max/real time. Yet another lie in the description and functionality. Some buttons you hold for 3 second, some for 4... WHY??? Pretty poor and sloppy implementation to an otherwise fine instrument... guess you get what you paid for! A hint... check the fan's balance by holding the meter vertical, with no airflow, and see if the fan tries to swing to the heavy side. This will tell you that low speed measurements will probably be wrong. ## Frequently Bought Together - BTMETER BT-866A Pro Handheld HVAC Anemometer for CFM Air Flow, Wind Speed Meter Gauge Measures Wind Velocity Temp%RH Dew Point with USB Sync to PC - Manometer, Professional Air Pressure Meter, Dual-Port HVAC Digital Manometer Gas Pressure Tester,12 Selectable Units Differential Pressure Gauge, (Included Battery) - ZIBOO ASP2 Soft Tube,Static Pressure Probes with Compatible with Fieldpiece JL3KM2, SDMN5，SDMN6，ADMN2,HVAC Pitot Static Tube Fit for Many Dual Port Manometer with2x 39.37FEET(1.0M) Soft Tube --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.nz/products/150156623-btmeter-866a-pro-handheld-hvac-anemometer-cfm-air-flow-meter](https://www.desertcart.nz/products/150156623-btmeter-866a-pro-handheld-hvac-anemometer-cfm-air-flow-meter) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-09-19*