With high-quality measuring technology and smart measurement assistants, the testo 400 supports a wide range of applications, from standard-compliant HVAC grid measurements to long-term monitoring of indoor air quality. Its built-in sensors for differential pressure and absolute pressure enable location-independent, highly precise measurements.
You can also connect the testo 400 with a broad range of compatible Bluetooth® and cable probes, making it flexible for any measurement task. This includes flow velocity, CO2 and CO, radiant heat, illuminance, and turbulence. It even integrates with the testo 420 volume flow hood to manage volume flow measurement at large air inlets and outlets.
The instrument also supports long-term monitoring via an IAQ data logger for continuous air quality measurements. Furthermore, the testo 400 offers smart features such as measurement programs tailored to specific standards (like EN ISO 7730 and ASHRAE 55), and customer management tools to help you work efficiently on-site.
For ease of use, it comes with a smart-touch display for quick, intuitive operation. Measurement results and reports can be sent directly via WLAN or Bluetooth®, and further analysis and documentation can be done using the testo DataControl PC software.
Ideal For
- HVAC Professionals: Perfect for air flow, temperature, humidity, and ventilation system inspections.
- Environmental Monitors: Helps ensure compliant indoor air quality in commercial or residential spaces.
- Long-Term IAQ Monitoring: Offers the tools to measure and monitor IAQ over extended periods.
