Testo | 405i

Hot-wire Anemometer Smart and Wireless Probe

Reference : TES405i
Serie : Smart Probes, i series, connected tools
Purchase Order Reference : 0560 1405
Brand : Testo
Sonde à fil chaud pour la mesure de la vitesse d'air connectée
- Mesure de la vitesse de l'air, du débit volumétrique et de la température
- Configuration aisée des dimensions et de la section du conduit pour déterminer le débit volumétrique
- Tube télescopique extensible jusqu'à 400 mm & orientable à 180°.
- Etendue de mesure : 0 à 30 m/s et -20 à +60 °C
- Application gratuite Testo Smart Probes
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Quick quote for this product
Quick quote for this product

Testo 405 i - Hot-wire Anemometer Smart and Wireless Probe


The testo 405i Smart Probe hot-wire anemometer is a wireless instrument for measuring air flow velocity. temperature. and volume flow. It is equipped with a telescopic shaft which extends to 15” for easy in-duct testing. You can reliably determine timed and multipoint flow traverses.

Key Features:

  • Measures air velocity. volume flow. and temperature
  • Measures in-duct air flow and automatically calculates volume flow (enter duct dimensions simply)
  • Small dia. (<0.5”) and 15” telescopic shaft length is ideal for in-duct flow averaging and timed traverse
  • Perform air duct leakage tests


Users can read the measurements using the
testo Smart Probes App installed on their smart device. The app lets users configure duct dimensions to calculate volume flow measurements. Use the testo 405i along with
the testo 605i thermo-hygrometer to determine cooling and heating performance. The testo 405i works on smart devices with either Android or Apple operating systems.

The testo Smart Probes App is a powerful and easy-to-use tool. It allows you to remotely read measurements from up to six (6) Smart Probes and easily document/report the results. Automatic calculations make it a snap!

All measurement data is displayed as instrument readings. tables. or graphs. The measurements can be quickly saved as PDF or Excel files. The App creates custom reports which can be saved and/or shared by email. All your data can be stored and retrieved saving you hours of time
consuming paperwork!

What's included:

testo 405i. Bluetooth hot-wire anemometer with App. incl. 3 AAA batteries and certificate of calibration


Temperature - NTC

Technical data

Measuring range

-4° to 140 °F / -20 to +60 °C


±0.9 °F / ±0.5 °C


0.1 °F / 0.1 °C

Velocity - Hot wire anemometer

Technical data

Measuring range

0 to 5906 fpm / 0 to 30 m/s


±(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)


2.00 fpm / 0.01 m/s


General technical data

Technical data

System requirements

requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0


2 years

Battery type

3 x AAA

Battery life

15 h

Length probe shaft

15.7 in. / 400 mm

Storage temperature

-4° to 140 °F / -20 to +60 °C


8 x 1 x 2 in. / 200 x 30 x 41 mm

Operating temperature

-4° to 122 °F / -20 to +50 °C

Product Details
41-Standard Manufacturer Warranty 2 YEARS
192-Maximum velocity (m/s) 30 m/s
191-Minimum velocity (m/s) 0 m/s
193-Anemometer resolution (m/s) 0.01 m/s
201-Temperature range (°C) -20 to +60°C
200-Sensor type Hot-wire sensor
402-Bluetooth Yes
195-Thermometer accuracy (°C) +-0.5°C
196-Thermometer resolution (°C) 0.1°C
197-Anemometer functions (type) Flow
198-Choice of measuring unit °F, °C, fpm, m/s, cfm, m3 /h, l/s
188-Display No display, connected on smartphone/tablet
36-Additional Characteristics Connected probe (For Smartphone/tablet).Air velocity & temperature (thermo-anemometer) probe.Up to 400mm telescopic & 180° orientable probe
542-Metrology/Quality documentation supplied Verification official report
132-Package includes 405i, 3 AAA batteries, user manual, 1 verification certificate
35-Dimension (HxWxD) (mm) 200x30x41 mm
13-Net Weight nc
654-iOS compatible Yes
655-Android compatible Yes
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