Thermal anemometer with smartphone operation

  • measures volume flow, air velocity and temperature
  • Simple configuration of the dimension and geometry of the duct cross-section for determining the volume flow
  • Convenient for working in ventilation ducts through its telescopic tube, which can be extended up to 400 mm
  • convenient to operate through the testo’s Smart Probes 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. With Bluetooth, the readings are transmitted wirelessly straight to the testo Smart Probes App on your smartphone or tablet. You can view the values conveniently and use numerous intelligent features.

Operation independent of measuring location via your smartphone

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.

System requirements:

  • iOS 8.3 or later
  • Android 4.3 or later
  • Bluetooth 4.0

Packaged Inclusions

Testo 405i thermal anemometer with smartphone operation, including extendible (400 mm) telescope, batteries and calibration protocol.

Temperature – NTC

Measuring range -20 to +60 °C
Accuracy ±0.5 °C
Resolution 0.1 °C
Velocity – Hot wire
Measuring range 0 to 30 m/s
Accuracy ±(0.1 m/s + 5 % of mv) (0 to 2 m/s)
±(0.3 m/s + 5 % of mv) (2 to 15 m/s)
Resolution 0.01 m/s
General technical data
Weight 119.6 g
Dimensions 200 x 30 x 41 mm
Operating temperature -20 to +50 °C
Product-/housing material Plastic
System requirements requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Product colour black/orange
Battery type 3 AAA micro batteries
Battery life 15 h
Length probe shaft 400 mm
Storage temperature -20 to +60 °C