testo 405 Thermal Anemometer
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The Story
The Testo 405 Thermal Anemometer is a versatile instrument designed for HVAC professionals to measure air velocity, volumetric flow, and air temperature. With a telescopic probe extending up to 300 mm, it is ideal for quick checks in ventilation ducts and detecting drafts in rooms. Its high accuracy at low air velocities (0-2 m/s) makes it perfect for identifying draughty windows, while the illuminated swivel display and included duct bracket ensure convenient and precise measurements.
add_circle The Upside
- check Accurate low-velocity measurements ideal for draft detection
- check Extendable probe allows access to deep ducts
- check Durable with protective cap and long battery life (20 hours)
remove_circle The Downside
- close Limited to air velocity up to 10 m/s, not suitable for high-speed flows
- close No Bluetooth or data logging capability
- close Requires AAA batteries (included but not rechargeable)
Specifications & features
Key features
- check_circle Measures air velocity (0-10 m/s), volumetric flow (up to 99,990 m³/h), and temperature (-20 to +50 °C)
- check_circle Telescopic probe extends to 300 mm for duct measurements
- check_circle High accuracy at low velocities (0-2 m/s) for draft detection
- check_circle Illuminated display that swivels for easy reading
- check_circle Includes duct bracket and protective cap for sensor safety
Specifications
Accuracy (Temperature)
±0.5 °C
Accuracy (Velocity)
±(0.1 m/s + 5% of mv) (0-2 m/s); ±(0.3 m/s + 5% of mv) (remaining range)
Air Velocity Range
0 to 10 m/s (0 to +50 °C); 0 to 5 m/s (-20 to 0 °C)
Battery Life
Approx. 20 hours
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