The Testo 420 is a professional volume flow hood designed for precise measurement of air volume and airflow in ventilation systems. It is ideal for use in HVAC, building management, and indoor climate applications. The device features a large, easy-to-read display and a user-friendly interface, making it simple to set up and operate.

The Testo 420 is equipped with a high-precision sensor that ensures accurate flow measurements, allowing for quick and reliable air volume assessments. The hood is designed for flexible use in various environments, with adjustable settings to accommodate different duct sizes and airflow conditions. Its lightweight, portable design makes it easy to carry and use in the field.

With its fast and accurate measurements, the Testo 420 is an essential tool for commissioning, maintenance, and troubleshooting ventilation systems, ensuring optimal air quality and system performance.