SIGMA - Airflow resistivity meter


  • Quality Control;

  • Research and development;

  • Model acoustic materials;

  • Improve the accuracy of the indirect and inverse (Foam-X) methods.


  • Circular knives for porous materials

  • Porous material slicer

  • Enclosure

  • Foam-X Software

  • Nova software



The airflow resistivity meter is designed to obtain a reliable measurement of static airflow resistivity, resistance and permeability for a wide range of open-cell porous materials used for noise control. The system is based on the direct method described in the ASTM C522-03 and ISO 9053 standards.

SIGMA-X software detects automatically minimum flow velocity measurement range and allows you to obtain the pressure drop as a function of the flow velocity as low as 0.5 mm/s.

Standards & certifications

  • ASTM C522-03

  • ISO 9053

Main advantages

  • Measurement method according to ASTM and ISO standards

  • Automatic measurement sequence through a user-friendly interface

  • Automatic calculation of global statistics



  • Two specimen holders (diameter of 100 mm and 44.44 mm.) *Other specimen holder sizes available on request.

  • A resistive film support;

  • A verification sample;

  • Grids to support soft materials;

  • Rings to minimize air leakage around the sample;

  • SIGMA-X software.

Measured properties

  • Resistivity to the passage of static air (Pa.s/m² or rayls/m)

  • Resistance to the passage of static air (Pa.s/m or rayls)

  • Static permeability (m² or Darcy)