Weighs less than 6.2 lbs. (2.9 kg.)
Flow straightener for more precise measurement at
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.