Fabric Air Permeability Tester

Fabric air permeability tester

Fabric Air Permeability Tester is a lab instrument used to measure how easily air passes through a fabric. It quantifies the air permeability, which is crucial for evaluating breathability, comfort, and functional performance in textiles.

Purpose Fabric Air Permeability Tester:

It determines the rate of airflow through a fabric sample under a set air pressure, typically reported in units like cm³/cm²/s or L/m²/s.

Working Principle:

The tester creates a pressure difference across the fabric sample and measures the volume of air flowing through it. Higher air permeability means the fabric is more breathable.

Main Components of Fabric Air Permeability Tester:

– Test Head / Clamp: Holds the fabric securely without leakage.

– Pressure Regulator: Maintains a constant air pressure during testing.

– Flow Meter or Digital Sensor: Measures the actual airflow rate through the fabric.

– Display Unit: Shows readings of air permeability instantly.

Applications of Fabric Air Permeability Tester:

– Performance textiles (sportswear, PPE)

– Technical fabrics (filters, tents, airbags)

– Medical textiles (masks, gowns)

– Nonwovens and industrial materials

Benefits of Fabric Air Permeability Tester:

1. Accurate Breathability Measurement – Precisely measures how breathable a fabric is, essential for comfort and performance.
2. Supports Quality Control – Ensures consistent air permeability in fabric batches, critical for products like PPE, sportswear, and filters.

3. Enhances Product Design – Helps in selecting or engineering fabrics with the right airflow properties for specific uses.
4. Standard Compliance – Conforms to international testing standards (e.g., ASTM D737, ISO 9237), ensuring global credibility.
5. Quick and Reliable Testing – Provides rapid results, increasing lab efficiency and production decision-making speed.

6. Wide Material Compatibility – Suitable for woven, nonwoven, knitted fabrics, and even paper or coated materials.
7. Improves Functional Performance – Helps optimize products for ventilation, moisture control, and thermal comfort.
8. Reduces Product Failure – Identifies underperforming fabrics early, minimizing risks in high-performance applications.

Features of Fabric Air Permeability Tester:

1. Digital Display – Shows air permeability readings clearly in units like L/m²/s or cm³/cm²/s.
2. Precise Test Head/Clamp – Provides an airtight seal to prevent air leakage and ensure accurate results.
3. Adjustable Pressure Settings – Allows testing under various pressure drops (e.g., 10–2500 Pa), depending on fabric type.

4. Automatic Airflow Measurement – Built-in sensors or flow meters capture airflow rate automatically for quick analysis.
5. Multiple Test Area Sizes – Interchangeable test plates to match different sample sizes and standard requirements.
6. Data Logging and Export – Some models include USB or software connectivity for storing and exporting test results.

7. Standard Compliance – Conforms to ASTM D737, ISO 9237, BS 5636, DIN 53887, etc.
8. Robust Construction – Built with corrosion-resistant materials and durable components for long-term lab use.
9. Low Maintenance – Simple cleaning and calibration process for reliable performance.
10. Compact and User-Friendly Design – Ideal for lab benches and easy operation with minimal training.

How to Use Fabric Air Permeability Tester:

1. Prepare the Sample – Cut the fabric sample to the required size (usually circular, e.g., 20 cm²).
2. Mount the Sample – Place the fabric securely in the test clamp or holder, ensuring no wrinkles or gaps.
3. Set Test Parameters – Adjust the air pressure drop according to the fabric type or standard (e.g., 100 Pa).

4. Start the Test – Turn on the air supply and start the airflow through the fabric.
5. Read the Measurement – The digital display will show the air permeability value in the selected units.
6. Record the Results – Note the readings or export data if the device supports it.
7. Repeat if needed – Test multiple samples or areas for accuracy and average the results.
8. Clean and Maintain – After testing, clean the clamp and ensure the device is calibrated regularly.

Tip: Ensure the test environment maintains standard temperature and humidity for consistent results.

Fabric Air Permeability Tester

Appliance Range
It is used to TEST the air permeability of various textile fabrics, including industrial fabrics, nonwoven fabrics and other textile products and other breathable materials.
Related Standards
GB / T 5453, GB / T 13764, ISO 9237, ISO 5636, ASTM D737, etc.

Instrument characteristics
1. Automatic sample clamping, automatic nozzle replacement, and quick test.
2. Microcomputer processing, the test results are displayed directly, without manual table calculation;
3. Built-in continuous test mode, the test unit can be switched as needed.
4. Chinese LCD menu operation, configure computer interface.

Technical parameter
1. Range of sample pressure difference: 1 ～ 4000Pa
2. Measurable air permeability: 1 ～ 40,000mm / s
3. Measurement error: ≤ ± 2%
4. Measurable fabric thickness: ≤8mm
5. Test area: 5cm2; 20cm2; 50cm2; 100cm2
Ф50mm (≈19.6cm2)
Ф70mm (≈38.5cm2)

6. Nozzles: 11 in total (automatic replacement of digital setting)
CODE 00 01 02 03 04 05 06 07 08 09 10
DIAφ（mm）
0.8 1.2 2 3 4 6 8 10 12 16 20
7.Data Capacity:≤200 times tests
8.Power Supply：AC220V 50Hz 2KW
9.Weight：80Kg
10.Shape：1250×700×1250mm