Testo 405 i - Thermal Anemometer with Smartphone Operation

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.

Applications: Indoor Air Quality, Ventilation Ducts, HVAC, Pharma


Tax /GST included

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 Probes App on your smartphone or tablet. You can view the values conveniently and use numerous intelligent features.

System Requirements: 

• iOS 8.3 or later

• Android 4.3 or later

• Bluetooth 4.0


• for measuring 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 thanks to its telescopic tube, which can be extended up to 400 mm

• Really convenient to operate thanks to the testo Smart Probes App (e.g. easy viewing of readings, measurement data trend, log    function)

Data sheet

Testo 405i
Temperature - NTC
Measuring range: -20 to +60 °C ; Accuracy: ±0.5 °C ; Resolution: 0.1 °C
Operating Temperature
-20 to +50 °C
Battery Life
15 h
Storage Temperature
-20 to +60 °C
Velocity - Vane anemometer
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
Length probe shaft
400 mm
System requirements
requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
2 years

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