The 10 Best Hotwire Anemometers

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This wiki has been updated 18 times since it was first published in March of 2019. A hotwire anemometer is an essential tool when you're testing and repairing HVAC systems. These electronic devices can provide accurate measurements of air velocity, volume flow, and temperature, and a quality model comes equipped with an intuitive control panel, an easy-to-read screen, and a sturdy, telescopic probe. Here we rank them for functionality, durability, design, and price. When users buy our independently chosen editorial selections, we may earn commissions to help fund the Wiki.

1. Fieldpiece STA2

2. TES 1340

3. TPI 575C1

Editor's Notes

April 15, 2019:

A hotwire anemometer is a useful tool when you're carrying out surveys of HVAC systems, as well as for environmental monitoring and other projects involving the measurement of air flow velocity. The telescoping probe is convenient for inserting into ductwork for easy, quick readings.

Look to the Fieldpiece STA2 as a durable choice thoughtfully designed to be hung magnetically, so you don’t need to hold the meter while you’re busy testing. The flattened edges of the probe make it easy to hold it the correct way, for accurate readings.

If you prefer to see your results on your smartphone via a downloadable app, consider the Testo 405i, which consists of just a slim handle and the probe. The rest featured here all come with built-in LCD screens, but some provide a handy port for transferring data to your PC. These include the Extech 407123, TPI 565C1, and the Amprobe TMA-21HW. No matter which you ultimately choose, all of the models here are designed to provide accurate, quick results.

4. Dwyer 471B

5. Amprobe TMA-21HW

6. PerfectPrime WD9829

7. Testo 405i

8. TPI 565C1

9. Extech 407123

10. Testo 405

Karen Bennett
Last updated by Karen Bennett

Karen Bennett lives in Chicago with her family, and when she’s not writing, she can usually be found practicing yoga or cheering on her kids at soccer games. She holds a master’s degree in journalism and a bachelor’s in English, and her writing has been published in various local newspapers, as well as “The Cheat Sheet,” “Illinois Legal Times,” and “USA Today.” She has also written search engine news page headlines and worked as a product manager for a digital marketing company. Her expertise is in literature, nonfiction, textbooks, home products, kids' games and toys, hardware, teaching accessories, and art materials.

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