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Testo 521-3 Differential Pressure Meter up to 2.5 hPa
Testo 521-3 Differential Pressure Meter up to 2.5 hPa
The Testo 521-3 differential pressure measuring instrument is engineered for high-precision differential pressure measurements in air conditioning and ventilation systems. It is ideal for applications such as clean room measurements and flue inspections due to its high accuracy and excellent resolution. When used with an optional Pitot tube, the integrated pressure sensor can measure flow velocities from +1 to +20 m/s.
The integrated differential pressure sensor in the Testo 521-3 measuring instrument allows for the calculation of flow velocity and volume flow using a separately available Pitot tube. This instrument also features timed and multi-point mean calculation capabilities. With the optional ComSoft software, you can save measurement data linked to specific measuring locations and analyze it on a PC. Additionally, the optional Testo fast printer enables you to print measurement data directly at the measuring location.
Testo 521-3 Key Features
- Integrated temperature-compensated differential pressure sensor with accuracy of up to ± 0.5 Pa
- Calculation of the flow velocity and the volume flow via Pitot tube (optional)
- Direct zeroing of the display values of pressure probes
- 2 probe inputs for additional pressure and temperature probes
Testo 521-3 Specifications
| Feature | Details |
| Temperature – NTC | |
| Measuring Range | -40 to +150 °C |
| Accuracy | ±0.2 °C (-10 to +50 °C), ±0.4 °C (Remaining Range) |
| Resolution | 0.1 °C |
| Temperature – TC Type K (NiCr-Ni) | |
| Measuring Range | -200 to +1370 °C |
| Accuracy | ±0.4 °C (-100 to +200 °C), ±1 °C (Remaining Range) |
| Resolution | 0.1 °C |
| Differential Pressure (Internal Sensor) – Piezoresistive | |
| Measuring Range | 0 to 2.5 hPa |
| Accuracy | ±0.5 Pa (0 to 20 Pa), ±(0.5 Pa ±0.5 % of mv) (20.1 to 250 Pa) |
| Resolution | 0.1 Pa |
| Static Pressure | 1000 hPa |
| Overload | 50 hPa |
| Zeroing | To 0.5 hPa |