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Data Sheet PDF | Instruction Manual PDF
Description
The Testo 400 is an industrial-grade universal IAQ instrument developed for climate engineers, ventilation experts, and industrial hygenists. It serves as a central hub to evaluate all indoor air quality and thermal comfort metrics. This high-end instrumentation platform integrates a precision piezoresistive differential pressure sensor alongside an absolute pressure cell. Operating via a 5.0" smart HD touch display, it features step-by-step measurement assistants configured for error-free compliance testing according to global HVAC standards (EN ISO 12599, ASHRAE 111, EN ISO 7730, and ASHRAE 55). Featuring robust IP40 protection and extensive interface pathways for wired TUC, thermocouple, and Bluetooth probes, it facilitates detailed professional field evaluation and localized data processing through the Testo DataControl PC suite.
B2B Applications
- Standard-Compliant Ventilation Verification: Running automated HVAC grid measurements inside distribution duct networks according to EN ISO 12599 and ASHRAE 111 criteria.
- Workplace Comfort and Turbulence Auditing: Simultaneous multi-probe reading compilation to calculate thermal metrics like PMV/PPD, drought, and draught turbulence risk.
- Long-Term Climate Data Logging: Interfacing with modular environmental data loggers for uninterrupted air flow diagnostics and parallel localized balancing operations.
Technical Parameters
| Differential Pressure Range | 0 to +200 hPa |
| Differential Pressure Accuracy | ±(0.3 Pa + 1 % of mv) from 0 to 25 hPa, ±(0.1 hPa + 1.5 % of mv) from 25.001 to 200 hPa |
| Absolute Pressure Range | 700 to 1100 hPa (±3 hPa accuracy) |
| Temperature Inputs | 2 x TC Type K, 2 x TUC (NTC/Digital), 4 x Bluetooth connection nodes |
| Internal Reading Memory | 2 GB (Up to 1,000,000 process measurement values) |
| Protection Index Rating | IP40 |
Package Contents
- Testo 400 universal IAQ measuring instrument
- Integrated differential and absolute pressure cells
- USB interface connectivity line
- Factory calibration protocol and basic validation software