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Data Sheet PDF | Instruction Manual PDF
Description
The Testo 440 dP is an industrial-grade universal IAQ instrument engineered for high-precision climate analysis, ventilation system balancing, and compliance testing. This multifunction instrumentation device features an integrated piezoresistive differential pressure sensor, making it fully optimized for Pitot tube evaluations, fan diagnostics, and K-factor flow mapping. Operating via a clear graphic display that structures multi-parameter results simultaneously, it pairs seamlessly with up to three digital probes over Bluetooth or fixed TUC lines. Enclosed in a robust IP40 housing with back-mounted attachment magnets, it simplifies on-site data logging and workflow documentation through standard CSV data export via its integrated USB interface.
B2B Applications
- Pitot Tube and Fan Testing: Utilizing the integrated dP sensor loop to determine precise process flow velocities and static pressure differentials across ventilation fans.
- Automated Volumetric Flow Calculations: Mapping high-precision volume flow parameters by inputting duct dimensions or deploying K-factor formulas for specialized flow grilles.
- Turbulence and Draught Risk Auditing: Standard-compliant environmental testing according to EN ISO 7730 and ASHRAE 55 using optional digital turbulence probes.
Technical Parameters
| Differential Pressure Range | -150 to +150 hPa |
| Differential Pressure Accuracy | ±0.05 hPa (0 to 1.00 hPa), ±0.2 hPa + 1.5 % of mv (1.01 to +150 hPa) |
| Temperature Inputs (NTC) | -40 to +150 °C (±0.3 °C core baseline precision) |
| Thermocouple Interface Input | 1 x Type K (TC Range -200 to +1370 °C) |
| Interface Connectivity Paths | 1 x Bluetooth Node, 1 x TUC Cable Port, 1 x Internal dP connection, 1 x USB Node |
| Internal Memory Capacity | Up to 7,500 distinct measurement protocols |
Package Contents
- Testo 440 dP air velocity and IAQ instrument
- Integrated piezoresistive differential pressure cell
- 3 x AA mignon 1.5 V batteries
- Factory validation protocol and calibration data sheet