大型軽量フード付き風量計 testo 420

軽量のフード付き風量計 testo 420 は、回転式排気口などの大型の吸排気口での風量調整に適しています。スマートフォン対応のアプリにより、リモート操作も可能です。

The testo 420 volume flow measuring hood offers you the following

  • Ergonomic: uniquely light at less than 2.9 kg in weight (standard flow hood 610 x 610 mm).
  • High-precision: flow straightener significantly reduces the usual measurement errors at swirl outlets.
  • Efficient: fast set-up, easy handling and convenient operation via testo 420 App.
Measure volume flow using the testo 420

フード付き風量計 testo 420 の特長

  • 超軽量: わずか2.9kgの軽量設計
  • 高精度: 内部のフローストレーナーにより、渦流などでも正確に風量測定
  • 拡張性: 専用アプリにより、スマートフォンやタブレットとの通信が可能
  • 効率性: フードを給排気口に当てるだけの簡単操
  • 利便性: 読み取りに便利な大型ディスプレイ。角度調整や着脱が可能

Volume flow measurement via App



With the practical testo 420 App on your smartphone/tablet, you can fully exploit the possibilities of the flow capture hood.

Firstly, this means that you can operate the measuring instrument remotely and secondly, that you can send reports by e-mail directly on site as well.

Overview of the App functions:

  • Measuring value monitoring via the testo 420's graphic progression display and remote control
  • Creation of reports/documentation with photos or comments and dispatch by e-mail
  • Calculation of total volume flow and air exchange rate
  • Range of approx. 20 m with no obstructions via Bluetooth Low Energy
Mobile volume flow measurement

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Measure volume flow correctly with these advantages

  • In addition to the very low weight and the flow straightener, the following features will make your day-to-day work easier:
  • Ergonomic grips
  • Tiltable and removable display
  • Funnel-shaped tension rod sockets for quick and easy set-up
  • Trolley for secure transport also supplied
  • App integration for smartphones and tablets, turning these into a second display and remote control via Bluetooth. Particularly practical for the safe use of a tripod for high ceilings.

Volume flow measurement at swirl outlets - the background

Problem for measuring hood volumetric flow at swirl outlets: air turbulence

Volume flow measurement flow hood

乱流が起きやすい、大型の渦流式(回転式)の給排気口や換気口付近での風量の測定は容易ではありません。渦流はポイント測定の場合、測定場所によっては大きな誤差を引き起こすことがあります。この誤差を補正するのはほとんど不可能です。

Solution: volume flow hood from Testo with flow straightener

Volume flow measurement from Testo

testo 420 には、フード内部にフローストレーナーがあり、回転式の風の流れを直線の流れに整えます。このことで空調システムの風速を正確に実測することが可能です。

Other measuring instruments for VAC professionals

Volumetric flow measuring instruments

Sound level meter

A sound level meter measures the noise level of HVAC systems, amongst other things. Why is this important? With air conditioning and ventilation systems, it is not just a case of these being correctly set in terms of the volume flows and of rooms having adequate fresh air supply or used air extraction. That is merely the obligatory element. The voluntary element: the systems not only have to carry out this task in line with the specifications, but also as quietly and unobtrusively as possible. And this is precisely where the sound level meter comes into its own. It enables you to quickly determine the extent of the noise pollution from a system.

Volume flow measurement with anemometers

In addition to volume flow measuring hoods, Testo also offers further measuring instruments for air conditioning and ventilation measurements:

  • Vane anemometers measure flow, airspeed, air temperature and humidity at outlets or in ducts, amongst other things.
  • A thermal anemometer works without a vane and is above all used for the measurement of flow velocity, temperature and humidity directly in ducts or at outlets.

Flow meters

Unlike a volume flow measuring hood, this measuring device for volume flow measurement can often be employed as a multi-function instrument. The uses of a multifunctional flow meter therefore include volume flow measurement in ducts/at outlets and determination of comfort level or evaluation of illuminance too.