Testo 405i Wireless Hot-Wire Anemometer Smart Probe | 0560 1405
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Testo 405i Wireless Hot-Wire Anemometer Smart Probe — SKU: 0560 1405
The Testo 405i is a wireless thermal (hot-wire) anemometer from the Testo Smart Probes range, designed for measuring air velocity, temperature, and volume flow in ventilation ducts and indoor spaces. The extendable telescopic probe reaches up to 400mm, making it practical for duct measurements and hard-to-reach locations. It connects to your smartphone or tablet via Bluetooth and the testo Smart Probes App for volume flow configuration, data logging, and reporting.
The 405i is suited to HVAC/R technicians and building services professionals who need to measure air velocity inside ducts, locate non-airtight windows and building envelope leaks, and calculate volume flow from duct cross-section dimensions entered in the app. When used with the Testo 605i thermohygrometer, cooling capacities and heating outputs can also be calculated.
Confirm current testo Smart Probes App compatibility with your smartphone OS version before ordering. Confirm all specifications against the Testo 405i datasheet for your specific application.
Key Features
- Hot-wire thermal sensor — suited to duct measurements and low-velocity air flow
- Extendable telescopic probe — up to 400mm reach
- Measures air velocity, volume flow, and temperature
- Volume flow calculation via app — input duct cross-section dimensions intuitively
- Timed and multi-point mean calculations in the app
- Wireless Bluetooth connection to testo Smart Probes App
- View data as chart or table — export as PDF or Excel via email
- Calibration protocol included
- 2-year warranty
405i vs 410i — Hot-Wire vs Vane Anemometer
- Testo 405i (Hot-Wire, $266.95): Telescopic probe to 400mm. Best for duct measurements, low-velocity air flow, and locating building envelope leaks. Suited to measurements inside ducts and at hard-to-reach points.
- Testo 410i (Vane, $259.99): Vane sensor. Best for measuring air velocity at grilles, diffusers, and outlets. Suited to air balancing across multiple outlets.
What’s Included
- Testo 405i hot-wire anemometer smart probe
- Batteries
- Calibration protocol
App Requirements
- iOS 8.3 or later
- Android 4.3 or later
- Bluetooth 4.0
Confirm current app compatibility with your device and OS version before ordering.
Best For
- HVAC/R technicians measuring air velocity inside ventilation ducts
- Locating non-airtight windows and building envelope air leaks
- Volume flow calculation from duct cross-section dimensions
- Calculating cooling capacity and heating output with the Testo 605i thermohygrometer
Check Before Ordering
- Confirm testo Smart Probes App compatibility with your smartphone OS version
- Confirm measurement range and accuracy against the Testo 405i datasheet for your application
- For grille and outlet measurements, consider the Testo 410i vane anemometer
- Warranty: 2 years — confirm current terms at time of purchase
Frequently Asked Questions
What is the difference between the Testo 405i and 410i?
The 405i uses a hot-wire thermal sensor with a telescopic probe to 400mm — best for duct measurements and low-velocity air flow. The 410i uses a vane sensor — best for grilles, diffusers, and air balancing across multiple outlets.
What app does the Testo 405i use?
The testo Smart Probes App, available for iOS and Android. Confirm current compatibility with your device and OS version before ordering.
What is the warranty?
2 years. Confirm current terms with HVAC Trade Supply at time of purchase.
Browse the full Testo Smart Probes range or contact our team for advice.