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Testo 405i Hot-wire Anemometer Smart Probe (0560-1405)

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SKU: tt_0560-1405 Categories: , Brand:

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The Testo 405i Hot-wire Anemometer Smart Probe is a wireless instrument for measuring air flow velocity, temperature, & volume flow. It is equipped with a 15.7″ telescopic shaft for easy in-duct testing. You can reliably determine timed & multipoint flow traverses. Users can read the measurements using the Smart Probes app on their Android or Apple smart device. They can also configure duct dimensions to calculate volume flow measurements. Use the Testo 405i along with the Testo 605i thermo-hygrometer to determine cooling & heating performance.

The Testo Smart Probes app is a powerful & easy to use tool. It allows you to remotely read measurements & make automatic calculations from up to six Smart Probes. Results can be easily documented & reported. All measurement data is displayed as instrument readings, tables, or graphs. Save measurements as PDF or Excel files. The Testo 405i app creates custom reports you can save and/or share by email. All data can be stored & retrieved, saving you hours of time consuming paperwork!


  • (1) Testo 405i Hot-Wire Anemometer Smart Probe
  • (3) AAA Batteries
  • (1) Certificate of Calibration


  • Measures air velocity, volume flow, and temperature
  • Measures in-duct air flow, and automatically calculates volume flow (simply enter the duct dimensions)
  • Small diameter (<0.5”) and 15” telescopic shaft length is ideal for in-duct flow averaging and timed traverse
  • Perform air duct leakage tests
  • Measurement data is transmitted to the convenient and powerful Testo Smart Probes App in your smart device via Bluetooth
  • Live data feed integration now available with the MeasureQuick App
  • Tough, accurate, and easy-to-use
  • Compact and portable, extremely lightweight and time-saving for personal and professional servicing of A/C or HVAC systems


Temperature - NTC
Measuring range : -4° to 140 °F / -20 to +60 °C
Accuracy : ±0.9 °F / ±0.5 °C
Resolution : 0.1 °F / 0.1 °C
Velocity - Hot wire anemometer
Measuring range : 0 to 5906 fpm / 0 to 30 m/s
Accuracy :
  • ±(19.7 fpm + 5 % of mv) (0 to 394 fpm) / ±(0.1 m/s + 5 % of mv) (0 to 2 m/s)
  • ±(59.1 fpm + 5 % of mv) (394 to 2953 fpm) / ±(0.3 m/s + 5 % of mv) (2 to 15 m/s)
Resolution : .97 fpm / 0.01 m/s
General technical data
Weight : 4.22 oz. / 119.6 g
Dimensions : 8 x 1 x 2 in. / 200 x 30 x 41 mm
Operating temperature : -4° to 122 °F / -20 to +50 °C
Housing : Plastic
System requirements : Requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Product colour : black/orange
Battery type : 3 x AAA
Battery life : 15 h
Length probe shaft : 15.748 in. / 400 mm
Storage temperature : -4° to 140 °F / -20 to +60 °C


Q & A

How do i know how to position the testo 405i to get a proper reading?

An arrow on the top of the housing displays the direction of flow in which the measuring instrument has been calibrated and which achieves the best measurement results. Please note the direction of flow during usage.

Can you use the Testo 405i to measure water motion?

No, this is only used to measure air.

Does it come with a storage case?

No, it does not come with a case.

How do I get the testo Smart Probes App?

The testo Smart Probes App is available free of charge in the Google Play Store and the Apple Store. On every packaging of a Smart Probe, you will also find a QR code which links you directly to the right store.

Customer Reviews

Based on 2 reviews
Jill Sherman
Lots of features

Works good with the app.

Fantastic certified technology

Accurate and customizable . Great troubleshooting tool and easy to use.