testo 420 – Air Flow Capture Hood

Lightweight, tough, and accurate!


The new testo 420 flow hood is a convenient solution for balancing volume flow at registers and returns. With its lightweight design and clear display, it can be easily used, even in the toughest conditions.

– Patented flow straighteners greatly improve accuracy and stability of measurements at turbulent outlets

– Weighs less than 6.2 lbs.

– Quick, easy remote monitoring and reporting with Bluetooth and free App


See it in action!


Here’s More info!