Testo has entered the balometer flow hood market with its lightweight champion, the testo 420. Weighing in at only 6.3 pounds, it is one of the lightest and toughest flow hoods available. For superior accuracy on turbulent outlets, the testo 420 incorporates a built-in, patent-pending flow straightener.
The large, backlit, tilt-able display can be removed for use as a manometer for room pressurization or Pitot flow measurements. Download the free 420 App for additional functionality of simplified monitoring and reporting from your smart phone or tablet. The testo 420 is supported with a full complement of accessories, including additional hood sizes and a heavy duty rolling stand.