This vane probe head is part of Testo’s modular system for testing air velocity and indoor air quality. It attaches conveniently to your multifunctional 440 series meter so you can take readings in ducts. As it measures flow rates between 0.6 and 50m/s with an accuracy of ±0.2m/s, it's a reliable option. For versatility, the probe includes a sensor to read temperatures between -10°C and +70°C.

• Wand shape for convenient access in hard-to-reach spaces
• Printed scale along the length of the probe indicates how far you've placed it inside a duct

• Research laboratories
• HVAC engineers
• Health and safety inspectors
• Facilities management

Yes, it's Bluetooth-compatible when used with a Bluetooth-enabled handle (176-5621). Alternatively, you can transmit your readings via a wired handle (176-5620).