testo 417 Large Vane Anemometer


The testo 417 is a anemometer with built-in Ø 100 mm vane to measure flow speed, volume flow and temperature. Volume flow is shown directly in the display. Accurate volume flow calculation thanks to easy input of duct area. In addition, it is easy to switch to the current temperature reading. The flow direction, i.e. drawn in or blowing, is visible in the display. Timed and multi-point mean calculation provide information on mean volume flow, flow speed and temperature readings. The optional funnel set facilitates efficient measurements at ventilator grilles and disc outlets. Min/max values can also be shown in the display. Current readings can be frozen in the display using the Hold function.

  • Direction of flow recognition
  • Temperature, flow and volume flow measurement
  • Multi-point and timed mean calculation
  • Max/min values
  • Hold button to freeze readings
  • Display light
  • Auto Off function
  • Built-in Ø 100 mm vane
More Information
Warranty2 Years
Technical Data
Storage Temperature-30 to + 70°C
Operating temperature-20 to +60 °C
Battery type2 AAA micro batteries
Battery life100 h 
Dimensions265 x 48 x 19 mm
Housing material ABS/TPE/Metal 
Instrument Sensor
Measuring range-50 to +250 °C 
Accuracy±1.0 °C (-50 to -30.1 °C)
 ±0.5 °C (-30 to +99.9 °C)
 ±1 % of mv (+100 to +250 °C)
Resolution0.1 °C / °F / °R 
Reaction time  10 Seconds 
What's Included

testo 417 vane anemometer with integrated 100 mm vane incl. temperature measurement, battery and calibration protocol.

4 in 1 Measurement
Air Flow | Velocity | Volume Flow | Temperature

Auto Hold Function 

Large, backlit, easy to read display

Optional Attachable measurement funnels