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‎Testo

Testo 405i Anemometer

The testo 405i Hot-wire Anemometer is a versatile tool for measuring air velocity, in-duct airflow, and temperature wirelessly. Ideal for professionals in fields such as HVAC and environmental studies, it offers accuracy and convenience with its Bluetooth connectivity and compact design. However, it does require a compatible smartphone and may not be as robust for long-term use in harsh conditions.

Model: 0560 1405UPC: 4029547018299
Lowest at Amazon
$123.95 at Amazon
Lowest at any Popular Retailer
$123.95 at Amazon

Where to Buy

Prices last updated: April 29th 2026 5:31 am

Product Score

Based on professional reviews and customer feedback

8.55/10
Overall
9.1
Expert
8/10
Consumer

Why this score?

The Testo 405i Hot-wire Anemometer receives a high score due to its accurate and convenient measurements of air velocity and temperature, complemented by features like a telescopic probe and seamless Bluetooth integration. However, some users reported issues with temperature response time and connection reliability, which slightly impacts its overall perceived value. Overall, it's a worthwhile investment for HVAC professionals despite minor concerns.

8+ Excellent
6-8 Good
4-6 Average
<4 Poor

Score

The Testo 405i Hot-wire Anemometer receives a high score due to its accurate and convenient measurements of air velocity and temperature, complemented by features like a telescopic probe and seamless Bluetooth integration. However, some users reported issues with temperature response time and connection reliability, which slightly impacts its overall perceived value. Overall, it's a worthwhile investment for HVAC professionals despite minor concerns.

9.1/10
Expert
8/10
Consumer

Pros

  • Wireless connectivity simplifies data collection
  • Compact and portable, ideal for oite measurements
  • Accurate measurements for air velocity, iuct airflow, and temperature
  • Bluetooth 4.0 ensures stable connection with mobile devices
  • Useful for professionals in HVAC, meteorology, and environmental studies
  • Easy to use with a compatible app for reaime monitoring and logging
  • Helps in troubleshooting and optimizing HVAC systems

Cons

  • Requires a compatible smartphone or tablet for full functionality
  • Battery life could be better for extensive use
  • May not be as durable in harsh environments
  • Not designed for measuring in complete darkness

Bottom Line

The testo 405i Hot-wire Anemometer is a versatile tool for measuring air velocity, in-duct airflow, and temperature wirelessly. Ideal for professionals in fields such as HVAC and environmental studies, it offers accuracy and convenience with its Bluetooth connectivity and compact design. However, it does require a compatible smartphone and may not be as robust for long-term use in harsh conditions.

Read full expert review

What Reviewers Are Saying

Praised
easy to use27%
works great20%
accurate13%
Criticized
temperature measurement response7%
fragile7%
not calibrated right7%
limited range7%

Customer Ratings

481 reviews averaging 4.6 out of 5 stars from Amazon
4.6
481 reviews
5
72%
4
18%
3
6%
2
2%
1
2%

Based on 481 reviews from Amazon

Discussion

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