– Compatible with other hoppers from Testo
– For measurements on poppet valves and fans
– Controlled residential ventilation by testing the supply and exhaust air
– Reliable flow measurement with the testo 417 action set incl. testo 417 anemometer and two funnels (Ø 200 mm, 330 x 330 mm)
– Flexible and precise measurement at all ventilation outlets. Check supply air at a poppet valve with testo 417 anemometer and 200 mm funnel. Checking the exhaust air at a surface-mounted fan with testo 417 and 330 x 330 mm funnel.

















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