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0560 4053
testo 405 - Thermal Anemometer
0560 4053
testo 405 - Thermal Anemometer
The testo 405 thermal anemometer is for precise air velocity, volumetric flow, and temperature measurements in ducts and indoor environments – ideal for HVAC spot checks and draft detection.
- Highly accurate – at low air speeds (especially from 0 to 2 m/s).
- Measures – air velocity, volumetric flow, and air temperature.
- Integrated protective cap – for sensor protection.
- Extendible telescope up to 300 mm – ideal for duct measurements.
The permanently attached extendable telescope (up to 300 mm) makes it perfect for reaching into narrow ducts, while the swivelling, backlit display ensures that your readings are always easy to read, even in awkward positions. For added convenience and accuracy, the testo 405 comes with a mounting bracket for optimal placement in ducts.
One of its standout features is its high level of precision in the low-speed range (0 to 2 m/s), making it especially suitable for detecting drafts near windows or poorly insulated areas. When not in use, the built-in rotating protective cap safeguards the sensitive sensor.
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Temperature - NTC
Temperature - NTC | Measuring range -20 to +50 °C |
|---|---|
Accuracy ±0.5 °C | |
Resolution 0.1 °C | |
Velocity -Thermal anemometer
Velocity -Thermal anemometer | Measuring range 0 to 99990 m³/h 0 to 5 m/s (-20 to 0 °C) 0 to 10 m/s (0 to +50 °C) |
|---|---|
Accuracy ±(0.3 m/s + 5 % of mv) (Remaining Range) ±(0.1 m/s + 5 % of mv) (0 to 2 m/s) | |
Resolution 0.01 m/s | |
General technical data
General technical data | Weight 115 g (with batteries, without packaging) |
|---|---|
Dimensions 490 x 37 x 36 mm | |
Operating temperature 0 to +50 °C | |
Battery type 3 AAA micro batteries | |
Battery life Approx. 20 h | |
Display type LCD (Liquid Crystal Display) | |
Length probe shaft 300 mm | |
Diameter probe shaft 16 mm | |
Diameter probe shaft tip 12 mm | |
Storage temperature -20 to +70 °C | |
testo 405 - Thermal Anemometer, duct holder and batteries
Measurement of indoor air velocity
For workers to feel comfortable in their indoor working environments, "thermal comfort" has to prevail. The EN 13779 describes this as a state that prevails when people are satisfied with the air temperature, humidity, air movement and thermal radiation in a room, and require neither hotter, colder, nor drier or more humid indoor air.
The testo 405 is particularly well suited to measuring indoor flow velocity. Low air velocities, such as at draughty windows, can therefore be precisely located and measured extremely accurately.
Measurement in ventilation ducts
Observance of air flows in the ventilation duct is of utmost importance for the function of the ventilation and air conditioning system. If the air flows are smaller than intended, the removal of room loads (heating, cooling and substance loads) may not be ensured in certain circumstances. Therefore, the most accurate recording of air flows as possible is particularly important.
Our thermal anemometer testo 405 allows particularly cost-effective measurement of low air velocities. It enables the accurate and parallel measurement of air flow, volumetric flow and temperature. The extendible telescope allows measurement at a depth of up to 300 mm.
The display can be swivelled into various positions, enabling optimum measurement readout.
