Expand your measurement capabilities with the 100 mm vane probe head, designed for reliable determination of air velocity, volume flow, and air temperature. The probe head easily connects to Testo’s universal Bluetooth or cable handles using the handle adapter (available separately), and can also be used with the extendable telescope for added reach. Its compatibility with optional accessories like the testovent 417 funnel set and volume flow straightener ensures accurate readings even in turbulent airflow conditions. Thanks to the intelligent calibration concept, only the probe head needs to be sent in for calibration, keeping your measuring instrument in use at all times. Ideal for HVAC professionals who need flexibility, precision, and ease of use.