Pocket Size Thermal Anemometer – Testo 405

Model No: Testo 405Part No: 0560 4053

Testo 405 Pocket Size thermal anemometer to measure air velocity, volumetric flow and air temperature. Measurements in ventilation ducts and measuring air velocity in rooms

  1. Measurement of air velocity, volumetric flow and air temperature
  2. For measurements in ventilation ducts and in rooms
  3. Telescope extendible to 300 mm


Testo 405 thermal anemometer is a must-have. The thermal anemometer features a permanently mounted telescope and enables you to measure air flow, volumetric flow and air temperature. The measuring range for flow is between 0 to 10 m/s, volumetric flows are calculated up to 99,990 m3/h.

The extendible telescope (up to 300 mm) makes the thermal anemometer particularly suitable for flow measurements in ventilation ducts. The illuminated display can be swivelled into various positions, ensuring that the readings can be read off comfortably. The duct bracket (included in the delivery) offers key practical advantages. You can use this to optimally position the telescope in the ventilation duct and obtain precise measurement results.

Since the thermal anemometer testo 405 measures particularly accurately in the range between 0 and 2 m/s, you can also use it to measure the air velocity in rooms for checking indoor air quality. Low air velocities, at draughty windows for example, are quickly located and accurately measured using the thermal anemometer.

Integrated sensor protection: when you are not using the testo 405 thermal anemometer, the rotating protective cap protects the flow sensor from mechanical stress.

Technical Data

Temperature – NTC
Measuring range -20 to +50 °C
Accuracy ±0.5 °C
Resolution 0.1 °C
Velocity -Thermal Probe
Measuring range 0 to 5 m/s (-20 to 0 °C), 0 to 10 m/s (0 to +50 °C), 0 to 99990 m³/h
Accuracy ±(0.1 m/s + 5 % of mv) (0 to 2 m/s), ±(0.3 m/s + 5 % of mv) (Remaining Range)
Resolution 0.01 m/s
General technical data
Operating temperature 0 to +50 °C
Storage temperature -20 to +70 °C
Battery type 3 AAA micro batteries
Length probe shaft 300 mm



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