The testo 416 is a compact anemometer with a fixed vane probe. The measuring instrument is particularly suitable for flow velocity measurements in ducts thanks to the extendable telescope (max. length 890 mm, diameter 16 mm). The volume flow is directly shown in the display. For volume flow calculation purposes, the duct crosssection area can be conveniently entered into the testo 416. The timed and point mean value calculations provide information on the average volume flow.