The high airflow resistance meter (HF SIGMA) is designed to obtain reliable measurements of the airflow resistance, normalized resistance, resistivity, and viscous permeability in function of flow velocity for a wide range of open cell materials.
The flow velocity goes from 10 cm/s up to 280 cm/s for a 100 mm diameter sample (it depends on the atmospheric condition) and the measured pressure drop can be up to 17 kPa.
Material properties in function of flow velocity
➡ Pressure Drop (Pa)
➡ airflow resistance (Pa.s/m or rayls)
➡ normalized airflow resistance (normalized by air characteristic acoustic impedance)
➡ airflow resistivity (Pa.s/m² or rayls/m)
➡ viscous permeability (m² or Darcy)
Mecanum’s high airflow resistance meter is used by the world’s leading material suppliers for both automotive and aircraft industry for quality control in the manufacturing process of materials; research, development, and innovation, and for feeding acoustical prediction software dealing with sound absorbing materials, perforated plate, fabrics for a high sound pressure level application.
The system includes:
- One mobile specimen holders (100-mm diameter)
- Certified calibrated resistance
- HF SIGMA-X software
The HF SIGMA-X software fully controls the measurement and calculates the main properties and statistics related to the measurement. It corrects effects of atmospheric pressure and temperature.