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Testo 405i Thermal Anemometer Operated with smartphone

was £117.60 Special Price £111.60 £93.00
Availability: In stock
Testo 405i Thermal Anemometer Operated with smartphone
  • For measuring volume flow, air velocity and temperature
  • For use with the Testo Smart App on smart phones / tablets via Bluetooth
  • Simple configuration of the dimension and geometry of the duct cross-section for determining the volume flow
  • Convenient for working in ventilation ducts thanks to its telescopic tube, which can be extended up to 400 mm
  • Really convenient to operate thanks to the testo Smart App (e.g., easy viewing of readings, measurement data trend, log function)

With the testo 405i hot wire anemometer, you can measure air velocities, temperatures and volume flows. Via Bluetooth, the readings are transmitted wirelessly straight to the testo Smart App on your smartphone or tablet. You can view the values conveniently and use numerous intelligent features.

Comes complete with a calibration Certificate Traceable to National Standards when purchased new.

Product Description

No more surprises: the testo 405i thermal anemometer with smartphone operation from the Testo Smart Probes series is ideal for carrying out measuring tasks in ventilation ducts. It is easy to use the anemometer to determine air velocity, temperature and volume flows. The testo 405i is also suitable for measuring indoor air velocity.

The hot-wire anemometer testo 405i, in combination with a smart phone or tablet, is a compact measuring instrument for airflow velocities, temperatures and volume flows.  Equipped with a telescopic shaft which extended to 400mm it allows flexible applications in rooms and ducts.  With the testo Smart App installed, users can read of their measurements quickly, easily and reliably determine timed and multi-point mean values.  The measurement protocols can be directly sent as PDF or Excel files.

The testo 405i hot wire anemometer combines professional Testo measuring technology with App-based operation. This means you benefit from numerous additional functions in your day-to-day work. With the testo Smart Probes App, you can view readings conveniently on your smartphone or tablet. You no longer have to spend ages trying to make out the display at poorly accessible points. Volume flow can also be measured easily using the App: following intuitive input of the duct cross-section, the App calculates this completely automatically.

The App opens up other practical options too: it not only displays measurement data, but also evaluates and documents it. It is easy to carry out a timed and multi-point mean calculation with the App. It also displays the measurement data curve at the press of a button. And sends the measurement data logs as PDF or Excel files.

Technical Data

Temperature - NTC

Measuring range

-20 to +60 °C


± 0.5 °C


0.1 °C


Velocity - Hot wire

Measuring range

0 to 30 m/s


± (0.1 m/s + 5 % of rdg) (0 to 2 m/s)

± (0.3 m/s + 5 % of rdg) (2 to 15 m/s)


0.01 m/s


General technical data


119.6 g


200 x 30 x 41 mm

Operating temperature

-20 to +50 °C

Product-/housing material


System requirements

requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0

Product colour


Battery type

3 AAA batteries

Battery life

15 h

Length probe shaft

400 mm

Diameter probe shaft

12 mm

Diameter probe shaft tip

9 mm

Storage temperature

-20 to +60 °C

What’s Included:
  • testo 405i thermal anemometer with smartphone operation
  • including extendible (400 mm) telescope
  • batteries
  • calibration protocol

Testo 405i Thermal Anemometer comes complete with a calibration Certificate Traceable to National Standards/UKAS Test Equipment, when purchased from us, at no extra charge. 

Contact us for further information regarding Testo 405i Thermal Anemometer

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