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Weighs less than 6.2 lbs. (2.9 kg.)

Flow straightener for more precise measurement at

turbulent outlets

Large, tiltable, backlit display (removable)

App integration via Bluetooth for fast and easy monitoring

and reporting on site

testo 420 Flow hood

Lightweight, tough and accurate.




The new testo 420 flow hood is the light, precise and

convenient solution for regulating volume flows at supplies

and returns. At turbulent outlets in particular, the flow

straightener significantly improves measurement accuracy,

saving you time and headaches for these difficult situations.

Handling is especially easy with the low weight of less than

6.2 lbs. and ergonomic handles.

The display can be tilted for more comfortable readout.

In addition, Bluetooth will allow for connection to mobile

devices, which can be used as a second display or remote

control. This makes the use of a tripod (optional) for high

ceilings especially easy. Furthermore, users can utilize the

App to finalize and send measurement reports while still on



We measure it.