Testo 417 is a compact large surface anemometer with integrated flowtemperature vane it measures flow speed volume flow and temperature integrating measurement with the 100 mm vane makes it ideal for measurements at air outlets and inlets the flow direction drawing in or blowing is visible in the display the optional funnel set enables measurements to be made at ventilator grilles and disc valves volume flow is shown directly on the display duct area can be easily entered into the t