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Data Sheet PDF | Instruction Manual PDF
Description
The Testo 440 is a high-precision, handheld universal IAQ instrument engineered for professional multi-parameter climate analysis and ventilation balancing. This multifunction measuring instrument serves as a flexible data acquisition baseline, featuring built-in measurement assistants for standard-compliant evaluation of volume flow, indoor comfort indices, and cleanroom air velocity profiles. Designed to eliminate measurement uncertainty, it supports parallel processing from up to three connectable probes simultaneously: a digital Bluetooth probe, a wired TUC handle, and a Type K thermocouple sensor. Encased in a robust field housing with back-mounted attachment magnets and certified to IP40 protection guidelines, it saves valuable time through intelligent calibration loops and structured process data logging via a standardized USB port.
B2B Applications
- HVAC System Balancing: Direct calculation of volumetric displacement inside distribution ducts by configuring geometry metrics directly in the automated cross-section menu.
- Workplace Comfort and Draught Auditing: Automatic calculation of turbulence profiles and draught risk within industrial or office facilities according to EN ISO 7730 and ASHRAE 55 specifications.
- Cleanroom and Fume Cupboard Testing: Deployment with low-velocity digital probes down to 0.1 m/s to verify laminar process flows and fume extraction line profiles.
Technical Parameters
| Temperature Measuring Range (NTC) | -40 to +150 °C |
| Temperature Accuracy (NTC) | ±0.3 °C (-25 to +74.9 °C), ±0.4 °C (remaining boundaries) |
| Thermocouple Probe Input | 1 x Type K (TC range -200 to +1370 °C; ±(0.3 °C + 0.3 % of mv) accuracy) |
| Simultaneous Probe Interface Nodes | 1 x Bluetooth Smart Probe, 1 x Wired Digital/NTC Probe via TUC, 1 x TC Type K node |
| Internal Reading Memory | Up to 7,500 standard process measurement protocols |
| Enclosure Protection Class | IP40 |
Package Contents
- Testo 440 handheld multi-parameter instrument
- Integrated structural surface attachment magnets
- 3 x AA alkaline batteries
- Factory validation protocol and calibration sheet