Filter Efficiency Testing Equipment

The Filter Efficiency Testing Equipment is designed to evaluate filtration efficiency, dust protection performance, airflow resistance, and flow rate of products equipped with filters or filter media. You use this system to generate stable aerosol particles and measure particle concentration upstream and downstream of the test sample under controlled conditions. By combining aerosol generation, particle counting, and differential pressure measurement, the equipment provides reliable data to assess filtration effectiveness and flow resistance in accordance with relevant testing standards and user requirements.

Applications

• General ventilation air filters

• HVAC system filters and filter media

• High-efficiency particulate air (HEPA) filters

• Protective masks and respirators with filter elements

• Medical and industrial filtration products

Standards

(1) JG/T 22-1999 Test methods for performance of filters for general ventilation

(2) ANSI/ASHRAE 52.1-1992 Test methods for air cleaning devices for general ventilation

(3) EN 779:2002 Air filters for general ventilation – Determination of filtration efficiency

(4) JIS B 9908:2001 Test methods for ventilation air filter units and motor-driven air cleaners

(5) EN 1822 High efficiency particulate air (HEPA) filters

(6) ISO 29463 High efficiency particle air (HEPA) filters and filter media

(7) GB 2626 Respiratory protective equipment

(8) GB 32610 Technical specification of daily protective masks

(9) YY 0469 Medical surgical masks

(10) GB 19082 Medical disposable protective clothing

(11) GB 19083 Medical protective masks

Features

• Stable cold aerosol generation for consistent test conditions

• Simultaneous upstream and downstream particle measurement

• High-precision laser particle detection ensures accurate data

• Differential pressure measurement enables reliable resistance evaluation

• Designed to meet a wide range of international filtration standards

• Suitable for both research testing and compliance verification

Technical Parameters

Accessoriess

(1) Aerosol generation module

(2) Laser particle counter

(3) Differential pressure transmitter

(4) Sample mounting fixtures

(5) Operation manual

Test Procedures

1.Install the filter or test sample securely in the test holder.

2.Start the aerosol generation system and allow particle concentration to stabilize.

3.Adjust airflow and pressure according to the applicable test standard.

4.Measure particle concentration upstream and downstream simultaneously.

5.Record filtration efficiency, pressure drop, and flow rate data.

6.Stop the test after data collection is complete and save the results.

Conclusion

The Filter Efficiency Testing Equipment provides a comprehensive and reliable solution for evaluating filtration performance under controlled laboratory conditions. By integrating stable aerosol generation, precise particle measurement, and differential pressure analysis, you can obtain accurate data on filtration efficiency and airflow resistance to support product development, quality control, and standards compliance.

FAQ

1. What types of filters can you test with this equipment?

You can test general ventilation filters, HEPA filters, HVAC filters, and filtration products used in medical and protective applications.

2. How is filtration efficiency measured?

Filtration efficiency is calculated by comparing particle concentrations measured upstream and downstream of the filter.

3. Why is cold aerosol used in the test?

Cold aerosol provides stable particle generation without thermal effects, ensuring consistent and repeatable test conditions.

4. Can the equipment measure airflow resistance at the same time?

Yes. A differential pressure transmitter measures pressure drop across the filter during testing.

5. Is the system suitable for standard compliance testing?

Yes. It is designed according to multiple international and national filtration testing standards.

6. How do you ensure accurate test results over time?

Regular calibration, proper maintenance, and stable aerosol generation ensure long-term accuracy and reliability.