The compact vane anemometer testo 417 in Set 1, which includes two measuring funnels, has been designed to facilitate measurements at air inlets and outlets as well as at diffuser valves of HVAC systems. The integrated 100 mm vane quickly provides precise results. Temporal and point averages, as well as the volumetric flow rate, are automatically calculated and displayed on the device. This allows for particularly efficient regulation of controlled residential ventilation, including quick documentation with the testo Smart App. The app not only assists you in configuring the measuring device but also takes care of displaying, storing, and documenting the measurement values, turning your smartphone into a second display. The testo 417 Set 1 includes two measuring funnels for diffuser valves and ventilation grilles. These can be easily attached to the vane and cover a wide range of outlet sizes and formats.