Testo 405i - Thermal anemometer (Bluetooth)

Bluetooth thermal anemometer operated with smartphone, incl. batteries and calibration protocol
Part number: 0560 1405
Manufacturer: Testo
£69.00 (ex VAT)


Smart Phone + Smart Probes = Smart Work

The Bluetooth-capable hot-wire anemometer testo 405i, in combination with a smartphone or tablet, is a compact measuring instrument for air flow velocities, temperatures and volume flows. Equipped with a telescopic shaft, extendable to 400 mm, it allows flexible applications in rooms and ducts. Via the App installed on the end device, users can comfortably read off their measurement values, configure volume flow measurements quickly and easily, and reliably determine timed and multi-point mean values.

The measurement protocols can then be directly sent as PDF or Excel files. In combination with the Bluetooth thermal hygrometer testo 605i, the testo 405i is suitable for determining cooling or heating performance.



 Get all measurements directly to your phone and download results at the touch of a button



  • Compact professional measuring instrument from the Testo Smart Probes series, for use with smartphones/tablets
  • Measurement of air flow velocity and volume flow
  • Measurement data analysis and transmission via Smart Probes App
  • Telescopic shaft, extendable up to 400 mm
  • Small, compact, and easy to transport


Testo Smart Probes App

The App turns your smartphone/tablet into the display of the testo 405i. The operation of the measuring instrument as well as the display of the measurement values take place by Bluetooth via the Testo Smart Probes App on your smartphone or tablet – independently of the measurement location.

In addition to this, you can use the App to create measurement reports, add photos and comments to these, and send them by e-mail. The Testo Smart Probes App is completely free and is available for iOS from the App Store and Android via Google Play.


Sensor type Hot wire
Measuring range 0 to 20 m/s
Accuracy ±1 digit ±(0.1 m/s + 5 % m.v) (0 to 2 m/s)
±(0.15 m/s + 2.5 % of m.v.) (2 to 15 m/s)
Resolution 0.01 m/s


Sensor type NTC
Measuring range -20 to +60 °C
Accuracy ±1 digit ±0.5 °C
Resolution 0.1 °C


General technical data


requires iOS 7.1 or newer / Android 4.3 or newer
requires mobile end device with Bluetooth 4.0
Storage temperature -20 to +60 °C
Operating temperature -20 to +50 °C
Battery type 3 micro batteries AAA
Battery life 15 hrs
Dimensions 200 x 30 x 41 mm
Telescope extendable to 400 mm
Warranty 2 years

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