Testo® 420 - Volume flow measuring hood

With the testo 420 volumetric flow measuring hood for larger air inlets and outlets, you can quickly and precisely comply with hygienic guidelines and specifications for indoor air quality. It provides reliable support when calculating the total volume flow rate at air handling systems, for example in hospitals; office buildings or commercial buildings. High measurement accuracy at swirl diffusers thanks to volume flow rectifier The volume flow is often measured at swirl diffusers. Due to the swirling air at these diffusers, the air flows are often measured incorrectly. With the testo 420 volume flow measuring hood, these measurement errors can be significantly reduced. The integrated volume flow rectifier calms the turbulence and changes it into an almost uniform air flow. It thus precisely calculates the volume flow in the range of 40 ... 4,000 m3/h. Unique lightweight volumetric flow measuring hood with quick set-up The volumetric flow measuring hood with ergonomic handles and tilting display has a unique weight of less than 2.9 kg. This makes frequent volumetric flow calculations in large rooms as well as measurements above head height safe and comfortable to perform. A large measuring button on the volumetric flow measuring hood ensures easy recording of the measured values. The hood measures 610 x 610 mm. We offer additional hoods as accessories for other ceiling outlets. For air inlets and outlets that are located particularly high up, the use of our optional tripod is helpful. It can be pushed up to 3.3 meters. The volume flow measuring hood can be set up quickly and easily thanks to tensioning rods. The trolley included in the scope of delivery ensures safe transport. Create and send protocols directly on site via app connection Benefit from additional practical functions and download our free app. Mobile devices such as smartphones and tablets can be used as a second display and remote control via Bluetooth using the app connection. This is particularly practical for using a tripod with high ceilings. The app enables live measurement on AHU systems by means of start and stop function and saving the measurement data in txt format. Directly on site, you can create the measurement protocol with the app. Measurement results such as the total volume flow and the air exchange rate can be directly assigned to customer-specific protocol templates. You can then send your measured values and logs via the mail function. This saves you a lot of time and increases efficiency. Volumetric flow measuring hood with removable measuring device - performance overview The volumetric flow measuring hood for HVAC systems is equipped with a measuring device for displaying the measured data. The instrument can be tilted and removed for convenient reading of the measured values. With the testo 420 measuring instrument, you can measure flow velocity; volumetric flow, absolute pressure, temperature and relative humidity. At low pressures, the automatic zero adjustment ensures higher accuracies. All measured values are easy to read on the large, illuminated display. For analyses and documentation, measurement data can be stored and measurement logs can be created directly on site using an app connection on a mobile device. The management of the measurement data on the PC is very simple and without additional software via plug 610 x 610 mm measuring hood, 5 x clamping rods; USB cable, batteries and trolley.