Description Overview Mask air permeability tester using the latest technology Ideal instrument for testing air permeability of various masks, leather, cloth, fabric, paper, cardboard or other sheet objects Fully integrated automatic instrument Specifications Measure range: 0 to 400 L/min Accuracy: 0.01 L/min Linear error: <1% Measuring area: 490 mm Air flow rate: 8 L/min Pressure difference: 0 kPa to 2 kPa Weight: about 25 kg Dimension: 420 x 340 x 450 mm Voltage: 220 volts and 50/60 Hz Display: touch screen in English display