Roughness and Air Permeance Tester GT-N20 Product Introduction Application This equipment is used for air permeability and roughness testing in accordance with the Bendtsen method. Place the sample under the test head, press the start button, the test head drops down and gently clamps the sample. The test starts and when the preset flow rate stabilizes, the measured value is displayed. After the test, the sample is released and the head automatically returns to its original position and is ready for the next test. During a permeability test, the Gurley value is calculated from the standard and the default display is Gurley seconds. Standards ISO 8791, ISO 5636, DIN 53120 Feature Fully automated testing with no human influence. Large touch screen with adjustable flat feet. Automatic calibration and positioning of the test head at 98kPa constant pressure. Automatic test or manual test mode. With glass measuring surface. RS-232 Interface, USB Connection. User Interface The instrument is controlled via a touch screen and an auxiliary button. Visual control screen, intuitive menu operation, multi-language. Two data desktops, each with up to 10 representations and 20 values. The icon shows the results of the test. Statistical functions: graphs, average deviation, minimum and maximum values, etc. Regular update program (at no additional cost). Key Specifications Model GT-N20 Roughness test Standard test pressure 0.74 kPa, 1.47 kPa, 2.20 kPa Duration of time 1～40s (adjustable) Flow rate 25～5,000 ml/min Testing ring Φ31.5mm, width 150μm, weight 267g Air permeability test Testing area 10±0.2cm2 Display units ml/min, μm/(Pa*s) , second Accuracy Pressure difference: ±0.005kPa Flow rate: ±0.5% resolution, test value ±0.5s Power 110～230VAC, 50/60Hz Air compressor 400～600 kPa Dimension 270×680×600 mm (L×W×H) Weight About 23kg Accessories Option A 1Set Bendtsen Roughness Test Kit Option B 1Set Air Permeance Test Kit Option C 1Set Bendtsen Roughness Test Kit 1Set Air Permeance Test Kit