Testo India Pvt. Ltd.
Testo India Pvt. Ltd.

Air Velocity Measuring Instruments

Compact Thermal Anemometer with Fixed Velocity Probe

Humidity Temperature Measuring Instrument
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Model ID: Testo 425

Testo 425 is a compact anemometer comes with permanently attached thermal flow probe (probe head Ø 7.5 mm) incl. telescopic handle. Besides the device also has temperature measurement and telescope (max. 820 mm), battery and calibration protocol. Accurate and direct display of volume flow calculation thanks to easy input of duct area. Mean volume flow, flow speed and temperature readings are calculated with the help of timed and multi-point mean calculation.




  • Display light
  • Auto Off function
  • Temperature, flow and volume flow measurement
  • Easy switch to the current temperature reading
  • Max/min values
  • Hold button to freeze readings
  • TopSafe, the indestructible protective case (optional)
  • TopSafe, instrument protection against dirt and knocks

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