高流量流阻测试与分析仪（HF SIGMA：High Airflow Resistance Meter） 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.
 
高流量流阻测试与分析仪（HF SIGMA：High Airflow Resistance Meter）设计用于获得各种开孔材料的气流流阻、流阻率以及粘性渗透率的可靠测量。
 
对于100毫米直径的材料样品，流速从10cm/s上升到280cm/s（取决于大气条件），测得的压降可高达17千帕。
 
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.

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