---
product_id: 9490728
title: "Dwyer® Thermo-Anemometer Test Instrument, 471B-1, Measures Air Velocity and Temperature"
brand: "dwyer"
price: "₨582710"
currency: LKR
in_stock: true
reviews_count: 5
url: https://www.desertcart.lk/products/9490728-dwyer-thermo-anemometer-test-instrument-471b-1-measures-air-velocity
store_origin: LK
region: Sri Lanka
---

# 71-183 cm probe cable reach 9V user-replaceable battery ±3% air velocity accuracy Dwyer® Thermo-Anemometer Test Instrument, 471B-1, Measures Air Velocity and Temperature

**Brand:** dwyer
**Price:** ₨582710
**Availability:** ✅ In Stock

## Summary

> 🌬️ Master airflow like a pro — precision meets portability!

## Quick Answers

- **What is this?** Dwyer® Thermo-Anemometer Test Instrument, 471B-1, Measures Air Velocity and Temperature by dwyer
- **How much does it cost?** ₨582710 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/9490728-dwyer-thermo-anemometer-test-instrument-471b-1-measures-air-velocity)

## Best For

- dwyer enthusiasts

## Why This Product

- Trusted dwyer brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Data Memory:** Store and recall up to 99 readings with max, min, average, and hold functions for thorough analysis.
- • **Durable & Portable:** Lightweight 16 oz. design with protective probe cover and soft carrying case for on-the-go professionals.
- • **Extended Reach Probe:** Flexible 28" to 6 ft. coiled cable lets you access hard-to-reach ducts with ease.
- • **User-Friendly Interface:** 4.5-digit backlit LCD display with auto-off and low battery indicator keeps you informed and efficient.
- • **Precision Airflow Insights:** Accurate ±3% FS air velocity readings ensure you never miss a beat in HVAC diagnostics.

## Overview

The Dwyer 471B Thermo-Anemometer is a reliable, professional-grade instrument designed for precise measurement of air velocity and temperature in HVAC and industrial environments. Featuring a hot-wire probe with a flexible 71-183 cm cable, it offers ±3% full-scale accuracy within typical temperature ranges, stores up to 99 readings, and includes a backlit LCD for easy data viewing. Powered by a user-replaceable 9V battery, it combines durability, portability, and smart functionality to elevate your airflow diagnostics.

## Description

The Dwyer 471B thermo anemometer with hot-wire probe reaches into ducts to measure air velocity in m/s and fpm and air temperature in degrees C and F; calculates air flow volume; and has memory, maximum, minimum, average, and hold functions for analyzing air flow. The probe attaches to the meter body with a coiled cable that extends from 71 to 183 cm (28" to 6 ft.). Memory function stores and recalls up to 99 readings. Maximum and minimum functions display the highest and lowest recorded readings. Average function records readings over 10, 30, or 60 seconds and displays the average value. Hold function freezes a reading on the display to aid documentation. An integral cover slides over the head of the probe to protect the velocity and temperature sensors when not in use. The meter has a 4.5-digit LCD for viewing readings with a backlight for visibility in low light. The unit has an auto-off mode that can be programmed to power down after 10 or 30 minutes of non-use to conserve battery life and has a low-battery indicator. It has European Conformity (CE) marking. This anemometer is used for monitoring air flow and temperature in ductwork, spray booths, and exhaust hoods, among other applications. SpecificationsAir velocity range0 to 30 m/s; 0 to 6,000 fpmAir velocity resolution0.1%Air velocity accuracy+ or - 3% of full scale at temperatures from 4 to 32 degrees C/40 to 90 degrees FAir flow volume rangeTo 19,999 in selected flow unitsAir temperature range-40 to +100 degrees C/-40 to +212 degrees FOperating environment-15 to +51 degrees C/5 to 125 degrees FPower(1) 9V battery (included)Probe length203 mm/8"Weight454 g/16 oz.H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. Anemometers, also called wind meters, measure air velocity and are most commonly used for weather monitoring to determine wind speed and for HVAC applications to determine air flow within ducts. In addition to air velocity, anemometers may measure wind direction, air pressure, air flow volume, air temperature, humidity, light, and other properties. The most common types of anemometer are cup, vane, hot-wire, and Pitot tube. Cup and vane anemometers calculate air velocity based on the number of rotations of the cups or vane. Hot-wire anemometers calculate air velocity by measuring the change in electrical resistance as air flow cools a heated wire. Pitot tube anemometers measure air pressure within a tube and calculate air velocity based on the difference in pressure between the air inside and outside of the tube. Many anemometers have digital readouts and can display air velocity readings in different units of measure, such as meters per second (m/s), feet per minute (ft./min. or fpm), knots, miles per hour (mph), and kilometers per hour (km/h). Dwyer Instruments manufactures measurement and control instruments, including pressure gauges, flow meters, level instrumentation, temperature instrumentation, and air quality monitors. The company, founded in 1931, is headquartered in Michigan City, IN. What's in the Box?Dwyer 471B thermo anemometerHot-wire probe(1) 9V batteryWrist strapSoft carrying caseInstructions

## Features

- Low Cost, High Reliablity
- Simple Operation, Easy to Use
- Accuracy Air Velocity: ±3% FS within temperature range of 40 to 90°F (4 to 32°C).
- Power Requirements: 9 V alkaline battery, installed non-functional, user replaceable.

## Images

![Dwyer® Thermo-Anemometer Test Instrument, 471B-1, Measures Air Velocity and Temperature - Image 1](https://m.media-amazon.com/images/I/517LSFwa91L.jpg)

## Customer Reviews

### ⭐⭐ 2.0 out of 5 stars







  
  
    Need assistance
  

*by S***O on Reviewed in the United States on June 9, 2014*

I just bought this meter and is not measuring properly.  It measures about half the velocity.Is it some setting or maybe the probe is not working ?

### ⭐ 1.0 out of 5 stars







  
  
    Will never due business with a slap-happy outfit like Dwyer again
  

*by J***. on Reviewed in the United States on June 10, 2016*

Bought this and within several months, it quit working properly. Dwyer insists it needs to be returned for repair via Amazon. Amazon does not do that, and it was well past the return window period. Amazon graciously made a special exception to take it back for refund. Will never due business with a slap-happy outfit like Dwyer again.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great unit and easy to use!
  

*by R***S on Reviewed in the United States on August 5, 2018*

I bought this gauge for work to measure airflow and velocities in dust collection ductwork.  I would buy again.

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-18*