TESTO 420 Volume Flow Hood. 420 volume flow hood for larger ceiling outlets and at the same time enjoy multiple maintenance benefits on HVAC systems. Because the flow hood with the removable measuring instrument is not only exceptionally light, it also guarantees accurate volume flow calculations at swirl outlets.

  • Detachable 420 Multi-function flow instrument that can be used with the 420 flow hood, pitot tubes, or flow matrix
  • Quick, easy remote monitoring and reporting with Bluetooth and free App
  • Data logging using on-board 2 GB memory
  • Logged data can be transferred to PC using mini-USB cable
Measuring range -20 to +70 °C
Accuracy ±0.5 °C (0 to +70 °C)

±0.8 °C (-20 to +0 °C)

Resolution 0.1 °C
Reaction time 45 s (t90)