Testo Vane Probe Head 100 mm Diameter for Air Velocity Measurement (0635 9430)

Precision air velocity measurement in large ducts and outlets starts with the Testo 100 mm vane probe head. Its large-diameter rotating vane captures airflow accurately across a wide range from 0.3 to 35 m/s, making it indispensable for HVAC commissioning, ventilation system balancing, and cleanroom verification. The probe head connects to Testo multifunction instruments (e.g., Testo 400, 440, 435, 480) via the universal handle, delivering reliable readings even in slightly dusty environments.

Advantages

The 100 mm vane diameter averages velocity across a larger cross-section, reducing errors from turbulent or non-uniform flow. Factory calibrated with an accuracy of ±(0.03 m/s + 5% of measured value) and a resolution of 0.01 m/s, it ensures trustworthy data for critical adjustments. Its robust ABS plastic housing and metal vane withstand field use, while the wide operating temperature range (-20 to +70 °C) suits most HVAC applications.

Suitable for

• HVAC system analysis and duct traverses
• Ventilation and exhaust system balancing
• Cleanroom airflow verification
• Large air outlets and grilles
• Industrial airflow monitoring

Key specifications

• Probe type: Vane probe head
• Vane diameter: 100 mm
• Velocity range: 0.3 to 35 m/s
• Accuracy: ±(0.03 m/s + 5% of measured value)
• Resolution: 0.01 m/s
• Operating temperature: -20 to +70 °C
• Storage temperature: -40 to +85 °C
• Connection: Testo universal probe handle (wired or Bluetooth)
• Material: ABS plastic housing, metal vane
• Measurement principle: Rotating vane

Recommendations

For optimal accuracy, align the vane head perpendicular to the airflow and allow the vane to reach thermal equilibrium before logging. Regular recalibration is recommended to maintain specified accuracy. Pair with a Testo multifunction instrument and a telescopic handle for hard-to-reach ducts.