GBPI N900 – Automatic Textile & Fabric Air Permeability Tester
- Fully automatic textile air permeability tester for woven fabrics, knitted textiles, non-wovens, and industrial felts
- Full testing compliance with ASTM D737, ISO 9237, GB/T 5453, BS 5636, and DIN 53887
- Extensive airflow velocity measurement range from 1 to 5,000 mm/s with error ≤±2%
- User-programmable test differential pressure drop from 1 to 5,000 Pa
- Four interchangeable test head apertures: 5 cm2, 20 cm2, 50 cm2, and 100 cm2
- Accommodates sample thicknesses up to 10 mm with automated pneumatic specimen clamping arm
- Touchscreen interface with automated multi-unit conversion (mm/s, L/(m2·s), cfm, m3/(m2·h)) and thermal printer
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The GBPI N900 is an industry-benchmark, fully automated textile air permeability tester engineered to determine the airflow rate, breathability index, and gas permeation resistance of woven fabrics, knitted textiles, non-woven fleece, coated industrial canvas, automotive airbags, parachute fabrics, and paper-machine felts. Designed in strict compliance with premier textile and material testing standards including ASTM D737 (standard test method for air permeability of textile fabrics), ISO 9237, GB/T 5453, and BS 5636, this floor-standing instrument delivers fast, highly reproducible aerodynamic characterization.
The air permeability of a textile substrate directly governs thermal comfort in performance sportswear, filtration efficiency in industrial dust collector bags, inflation dynamics in automotive passive safety airbags, and windproofing in outdoor protective outerwear. Testing requires establishing a calibrated negative pressure differential across a defined specimen surface area and measuring the resulting airflow rate perpendicular to the fabric plane. Operating as a computerized textile air permeability tester, the GBPI N900 features an integrated variable-speed high-suction vacuum turbine paired with precision micro-differential pressure sensors that automatically stabilize the set pressure drop across the fabric without manual needle valve adjustments.
Wide Dynamic Range & Automatic Flow Orifice Selection
The instrument covers an extensive airflow measurement range from 1 to 5,000 mm/s across sample thicknesses up to 10 mm. An internal multi-orifice nozzle wheel automatically rotates into the optimal aerodynamic position matching the specimen's permeability, eliminating manual nozzle changing and operator handling errors.
Interchangeable Test Aperture Heads & Pneumatic Clamping
To accommodate diverse international standards, the N900 includes quick-change clamping fixtures for 5 cm², 20 cm² (ISO 9237 standard), 50 cm², and 100 cm² test areas. An automated pneumatic clamping arm applies consistent, calibrated clamping force that seals the specimen perimeter hermetically, preventing lateral air leakage across dense or textured fabric edges.
Featuring a standalone color touchscreen terminal, instantaneous unit conversion across 11 international metrics, and an integrated thermal report printer, the N900 is an indispensable testing apparatus for textile mills, technical garment manufacturers, and certified testing laboratories.
GBPI N900 Textile Air Permeability Tester – Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Test Principle | Automated Constant Differential Pressure Suction Airflow Measurement |
| Applicable Standards | ASTM D737, ISO 9237, GB/T 5453, BS 5636, DIN 53887, JIS L1096 |
| Differential Pressure Range | 1 ~ 5,000 Pa (User-programmable target pressure drop; e.g. 100 Pa, 200 Pa) |
| Pressure Measurement Error | ≤ ±2% of reading (High-precision electronic differential transducer) |
| Measurable Air Permeability Velocity | 1 ~ 5,000 mm/s (Broad spectrum for dense sailcloth to open mesh fabrics) |
| Interchangeable Effective Test Areas | 5 cm², 20 cm² (Standard ISO), 50 cm², 100 cm² (Quick-change fixtures) |
| Maximum Sample Thickness | ≤ 10 mm (Accommodates thick multi-layer felts, spacers, and padded outerwear) |
| Supported Measurement Units | mm/s, L/(dm²·min), L/(m²·s), m³/(m²·min), m³/(m²·h), cfm, cm³/(cm²·h), mL/s, mL/min, L/s, L/min |
| Specimen Clamping Mechanism | Pneumatic automatic clamping arm with airtight rubber gasket sealing ring |
| Overall Dimensions | 380 mm (L) × 640 mm (W) × 865 mm (H) |
| Instrument Net Weight | Approximately 50 kg (Sturdy vibration-free benchtop frame) |
| Working Power Supply | AC 220 V ±10%, 50 Hz; Total Power: 600 W |
Key Features & Engineering Highlights
- Compliance with ASTM D737 & ISO 9237: Directly satisfies premier international test standards for textile and fabric air permeance.
- Broad Dynamic Velocity Range: Accurately measures airflow velocities from 1 mm/s up to 5,000 mm/s with error ≤±2%.
- Automatic Nozzle Selection: Internal motorized nozzle wheel automatically indexes the ideal flow orifice for tested materials.
- Automated Pneumatic Clamping Arm: Ensures uniform peripheral clamping force, preventing edge air bypass on textured or elastic fabrics.
- 11 International Engineering Units: Instantaneous digital conversion across mm/s, L/(m²·s), cfm, and m³/(m²·h).
- Touchscreen Interactive Display: Real-time visualization of pressure stabilization, instantaneous flow rate, and historical statistics.
- Integrated Thermal Report Printer: Instant generation of test slips with specimen IDs, test areas, differential pressure, and mean breathability.
Standard Package & Accessories
| Item Description | Quantity |
|---|---|
| GBPI N900 Textile Air Permeability Tester Mainframe | 1 Unit |
| Interchangeable Test Heads Set (5 cm², 20 cm², 50 cm², 100 cm²) | 4 Sets |
| Precision Airflow Calibration Orifice Plate (Factory Standard) | 1 Pc |
| Pneumatic Air Regulator & Connection Tube Assembly | 1 Set |
| Integrated Micro Thermal Printer & Paper Roll | 1 Set |
| Power Supply Cable, Operating Manual & Calibration Certificate | 1 Set |
Target Industry Applications
Performance Sportswear & Outerwear
Evaluating breathability, windproofing, and moisture-vapor permeability balance in technical athletic garments, jackets, and ski apparel.
Automotive Airbags & Upholstery
Testing precise air venting characteristics of silicone-coated nylon airbag cushions and automotive seating fabrics.
Industrial Dust Filter Bags & Felts
Measuring airflow permeability and dust cake pressure drop in needle-punched felts, woven filter cloth, and baghouse filters.
Medical & Hygiene Non-Wovens
Characterizing air permeability of spunbond/spunlace non-wovens used in surgical drapes, medical gowns, and absorbent hygiene products.