Testo 400 Universal IAQ Instrument
What is the Testo 400 IAQ Instrument?
The Testo 400 Universal IAQ Instrument is a high-performance air quality meter designed for HVAC engineers, air quality specialists and building services technicians who need accurate measurement of airflow, temperature, humidity, pressure and indoor air quality parameters.
Built for professional commissioning, air balancing and environmental monitoring, it supports standard-compliant testing including EN 12599 and ASHRAE guidelines. With compatibility for a wide range of Bluetooth and wired probes, the Testo 400 provides a flexible solution for measuring CO₂, CO, turbulence, volume flow and more across commercial and industrial environments.
Its integrated differential pressure sensor and advanced measurement technology ensure reliable, location-independent results, making it a trusted tool for HVAC diagnostics, compliance testing and long-term IAQ monitoring.
How does the Testo 400 stand out in everyday use?
The Testo 400 combines advanced measurement capability with an intuitive touchscreen interface, making complex IAQ testing faster and easier on site. Smart measurement programs guide engineers through standardised tests, reducing setup time and improving accuracy.
With built-in data logging, wireless connectivity and professional reporting via Testo software, engineers can capture, analyse and document results efficiently, helping streamline workflows and deliver clear reports to clients.
Order today to enjoy free delivery, expert support and our 90-day satisfaction guarantee. Need advice? Our team is here to assist you.
