• 0560 1405 01
  • 0560 1405
  • Usually ships in 3-5 business days



  • Measure in-duct air flow & perform air duct leakage tests
  • Small <0.5in diameter probe with 15in telescopic shaft length
  • 0 to 6,000fpm flow velocity
  • 0 to 99,999cfm volume flow
  • -4 to 140°F temp range
  • °F, °C, fpm, m/s, cfm, m3/h, & l/s measuring units
  • 2 year warranty

What's in the Box

  • 3 AAA batteries
  • Calibration cert


The Testo 405i 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 15ft for easy in-duct testing. You can reliably determine timed and multipoint flow traverses.

Users can read the measurements using the Testo Smart Probes App installed on their Android or Apple smart device. The app lets users configure duct dimensions to calculate volume flow measurements.

The Testo Smart Probes App is a powerful and easy-to-use tool. It allows you to remotely read measurements from up to six Testo smart probes and easily document/report the results. 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.