The digital hot wire probe with Bluetooth® and integrated temperature and humidity sensors is designed for professional, high-precision measurements in ventilation ducts. With wireless connectivity to compatible testo multifunction measuring instruments (sold separately), this probe simplifies the measurement process while delivering highly accurate data.

It measures air velocity (0 to +30 m/s), volume flow, air temperature, and humidity – making it ideal for comprehensive indoor climate monitoring. The integrated absolute pressure compensation ensures precise and consistent results across various environments.

Equipped with a scalable telescope (extendable to 1.0 m) and optionally up to 2.0 m with a separate extension, the probe allows easy access to large or hard-to-reach ductwork. A button on the handle lets you store readings directly during multi-point or timed mean calculations, while rotatable protective caps safeguard the sensitive sensors when not in use.

Bluetooth® connectivity ensures minimal cable clutter and seamless data transmission up to 20 meters, increasing mobility and efficiency on-site. For locations where wireless signals are restricted, the universal handle can also be swapped with a wired version.

Thanks to Testo’s intelligent calibration concept, only the probe head needs calibration, ensuring continuous instrument availability and reduced downtime.