Aerosol Generator

Aerosol Generators and Their Role in Cleanroom and Air Filtration Testing

Aerosols are very small solid particles or liquid droplets suspended in the air. In nature, aerosols often appear in forms such as fog, smoke, or fine dust. In industrial and research environments, aerosols are generated in a controlled manner to support various tests related to air quality and filtration systems.

To create a stable aerosol source, aerosol generators are commonly used. These devices produce aerosol particles with defined sizes and concentrations, enabling testing processes related to cleanrooms, HVAC systems, and high-efficiency air filters.

The Role of Aerosol Generators in Filtration System Testing

Aerosol generators are widely used in industries where air quality control is essential, particularly for testing HEPA or ULPA filters. During the testing process, an aerosol generator produces particles with specific sizes and introduces them into the ventilation system.

Particle counters or aerosol photometers are then used to measure the particle concentration downstream of the filter in order to evaluate filtration efficiency and detect potential leakage points. Because the aerosol source remains stable during testing, the results can achieve high accuracy and comply with cleanroom testing standards.

In addition to filter testing, aerosol generators are also used for particle counter calibration, HVAC system testing, and smoke simulation during fire detector inspections.

Common Aerosol Generator Models

Today, a variety of aerosol generators are available on the market to support different testing applications. Some widely used brands in cleanroom testing include ATI and GTI.

GTI aerosol generators are commonly used for ventilation and air filtration testing due to their ability to generate stable aerosols across a wide airflow range. For example, the GTI 3990-03 Aerosol Generator can produce aerosol particles for airflow ranges from approximately 500 to 2000 cfm, making it suitable for HEPA filter testing in HVAC systems and cleanrooms.

ATI aerosol generators are also widely used in filter testing applications. The ATI TDA-4B Aerosol Generator is a well-known model that utilizes the Laskin nozzle principle to generate aerosol particles for HEPA filter leak testing in cleanrooms as well as pharmaceutical and electronics manufacturing facilities.

These generators are often used together with aerosol photometers to accurately locate leakage points and evaluate the performance of filtration systems.

How to Choose the Right Aerosol Generator

Selecting an appropriate aerosol generator should be based on the specific testing requirements. For large cleanroom or ventilation systems, the generator must be capable of producing sufficient aerosol flow to ensure uniform particle distribution throughout the system.

Besides airflow capacity, particle size is also an important factor because some testing procedures require extremely small particles to accurately evaluate filter efficiency.

Users should also consider operational stability, portability, and compatibility with particle counters or aerosol photometers used during the testing process.

Choosing a Reliable Aerosol Generator Supplier

For equipment used in cleanroom and air filtration testing, accuracy and operational stability are critical factors. Therefore, choosing a reliable supplier helps ensure genuine products and compliance with necessary technical standards.

EMIN currently offers a range of aerosol generators from brands such as ATI and GTI for applications including cleanroom testing, HEPA filter testing, and industrial ventilation system inspections. Users can select the appropriate model depending on their specific testing requirements and technical standards.