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    Volume flow measurement with the testo 400

    Standard-compliant volume flow measurement

    With the universal IAQ instrument, you can measure volume flows in ducts and at outlets efficiently, intuitively, and in compliance with standards.

    • Interactively guided measurement menus
      The testo 400 helps you to work in compliance with DIN EN 12599 or ASHRAE 111. It guides you step by step through the measurement, reliably preventing any incorrect measurements from being made.

    • Convenient measurement
      Telescopes with easy-to-read scaling make it really convenient to work in ducts.

    • Efficient data management
      Customer and measuring point information can be transferred from software allowing complex series of measurements to be conveniently analyzed on a PC down to the very last detail.

    • Intelligent calibration concept
      The adjustment function allows you to store the calibration deviations determined during calibration at up to six measuring points in the digital probe. This gives you a zero-error display.

    Optimal combination of measuring instrument, probe and accessories?

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    Professional, standard-compliant, and convenient determination of the volume flow

    • In the duct by means of grid measurement in accordance with EN ISO 12599 and ASHRAE 111

    • At the outlet with the extendible telescope (2 m)

    • For turbulent flows with the right flow straightener

    • NEW: measure even at large outlets using the testo volume flow hood.

    Professional, standard-compliant, and convenient determination of the volume flow

    • In the duct by means of grid measurement in accordance with EN ISO 12599 and ASHRAE 111

    • At the outlet with the extendible telescope (2 m)

    • For turbulent flows with the right flow straightener

    • NEW: measure even at large outlets using the testo volume flow hood.

    Professional, standard-compliant, and convenient determination of the volume flow

    • In the duct by means of grid measurement in accordance with EN ISO 12599 and ASHRAE 111

    • At the outlet with the extendible telescope (2 m)

    • For turbulent flows with the right flow straightener

    • NEW: measure even at large outlets using the testo volume flow hood.

    Professional, standard-compliant, and convenient determination of the volume flow

    • In the duct by means of grid measurement in accordance with EN ISO 12599 and ASHRAE 111

    • At the outlet with the extendible telescope (2 m)

    • For turbulent flows with the right flow straightener

    Kits and probes for carrying out measurements in ducts and at outlets

    Application videos

    Volume flow measurement in ducts and at outlets

    More probes and accessories

    Fully exploit the potential of the testo 400.

    Practical guide

    Air flow measurements in ducts according to DIN EN 12599

    Download the exclusive practical guide for free now.

    Go to download

    Significance of air velocity

    Measurement of the right air velocity

    The right measurement location

    The measurement method

    Analysis of the measurement values

    The measurement report

    Valuable measuring facts about testo 400

    Measurement menus

    Go to the download

    Overview of the measurement menus

    Which stored measurement menus in the testo 400 can assist you with volume flow measurements?

    testo 400 Brochure

    Everything you need to know about the testo 400 universal IAQ instrument in one concise brochure

    Quick Guide testo 400 and testo 420

    Measure at large outlets using the testo 400 and testo 420.

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