---
product_id: 150156623
title: "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"
brand: "btmeter"
price: "₪347"
currency: ILS
in_stock: true
reviews_count: 13
category: "Btmeter"
url: https://www.desertcart.co.il/products/150156623-btmeter-866a-pro-handheld-hvac-anemometer-cfm-air-flow-meter
store_origin: IL
region: Israel
---

# USB data sync & logging Measures up to 999,900 CFM airflow 0.01 m/s ultra-sensitive wind speed 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

**Brand:** btmeter
**Price:** ₪347
**Availability:** ✅ In Stock

## Summary

> 🌪️ Master the airflow game with precision and power in your palm!

## Quick Answers

- **What is this?** 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 by btmeter
- **How much does it cost?** ₪347 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/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, lightweight, and rugged with a protective case and tripod mount—take it anywhere from rooftops to remote job sites with confidence.
- • **Smart Sensor Design:** Dual temperature sensors shielded from sunlight ensure ultra-reliable temp and humidity readings, so your data stays true under any conditions.
- • **Seamless USB Syncing:** Effortlessly log and analyze real-time wind, temperature, humidity, and dew point data on your PC—turn insights into action without missing a beat.
- • **Precision Wind Mastery:** Capture wind speeds from a whisper (0.3 m/s) to a gusty 40 m/s with ±2% accuracy—perfect for HVAC pros who demand exact airflow data.
- • **All-in-One HVAC Balancer:** Directly displays CFM airflow and wind velocity—ditch manual calculations and optimize your ductwork and vents like a pro.

## Overview

The BTMETER BT-866A Pro is a handheld HVAC anemometer engineered for professionals who demand precision. It measures wind speed (0.3–40 m/s), temperature, relative humidity, dew point, and airflow volume up to 999,900 CFM with ±2% accuracy. Featuring an ultra-sensitive 8-vane sensor, USB data logging, and a rugged portable design, it’s ideal for HVAC balancing, duct testing, and environmental monitoring. Its smart sensor placement ensures reliable readings, while PC connectivity enables real-time data analysis—making it an indispensable tool for millennial managers optimizing indoor air quality and system efficiency.

## Description

desertcart.com : 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 : 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 | #111,117 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #23 in Wind Speed Gauges |
| Brand | BTMETER |
| Brand Name | BTMETER |
| Customer Reviews | 4.0 out of 5 stars 208 Reviews |
| Item Dimensions | 3.4 x 1.5 x 6.5 inches |
| Item Weight | 200 Grams |
| Item dimensions L x W x H | 3.4 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 |
| Part Number | BT-866A |
| UPC | 778469100936 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** BTMETER
- **Item Weight:** 200 Grams
- **Item dimensions L x W x H:** 3.4 x 1.5 x 6.5 inches
- **Material:** Acrylonitrile Butadiene Styrene (ABS)
- **Number of Items:** 1

## Images

![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 - 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.

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*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-07-16*