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DOP Testing Vacuum Cleaner HEPA Filters

DOP Testing Vacuum Cleaner HEPA Filters

DOP testing is a method used to evaluate the efficiency of high-efficiency particulate air (HEPA) filters, including those used in vacuum cleaners. HEPA filters are designed to trap extremely small particles, including dust, pollen, mold, and bacteria, making them highly effective in improving air quality.

DOP testing using an aerosol photometer and aerosol generator is also required to meet numerous local and global standards including the Australian standard (AS/NZS 60335.2.69:2017) relating to M & H class vacuum cleaners. While DOP testing is commonly referred to on this page, all of our photometers are typically used with non carcinogenic PAO (poly Alpha Olefin) oil which we can supply and is available through various outlets in Australia.

Why DOP Testing

DOP testing is important for testing HEPA filters on vacuum cleaners for several reasons:

Performance Verification: DOP testing verifies whether the HEPA filter meets the required efficiency standards. It ensures that the filter can effectively capture particles, enhancing the overall performance of the vacuum cleaner.

Health and Safety: HEPA filters are essential for trapping harmful particles, especially for individuals with allergies, asthma, or respiratory conditions. Ensuring that the filter functions as intended is crucial for maintaining good indoor air quality and protecting the health of the users.

Compliance: Many regulatory standards and certifications mandate the use of HEPA filters in certain environments, such as healthcare facilities and cleanrooms. DOP testing ensures compliance with these standards, allowing vacuum cleaner manufacturers to market their products as meeting industry requirements.

Quality Control: DOP testing is a quality control measure that helps manufacturers identify any defects or issues with the HEPA filters before they are installed in vacuum cleaners. This helps in maintaining consistent product quality and customer satisfaction.

  • 28.3 LPM flow rate
  • Impressive +/- 2.5% flow accuracy
  • 0.0001 to 700 ug/L measurement range
  • 0.0001% to 100% leakage detection
  • Upstream aerosol mass concentrations are displayed in actual micrograms per litre (ug/l)
  • Long life laser diode technology
  • Highly accurate, stable and reliable measurements
  • Large 5 inch color touch screen display
  • Built-in audit tracing
  • 0.5% of reading repeatability
  • Built-in battery with 3.5 hours run time
  • Built in printer for instant results
  • 100,000 groups of onboard data storage. Sampled data can be imported to a PC
  • Light and voice alarms when you exceed the set value
  • Supports PAO, DOP and other aerosols
  • Ruggedized carry cases included
  • User permission assignment capabilities
  • Many other advanced features

All of our photometers are manufactured by an ISO 17025 accredited global manufacturer which provides both instrumentation and calibration services to this effect. All our photometers come supplied with (at no additional cost) a NATA approved calibration certificate.



  • AS 1807:2021 Australian standards
  • ISO 14644-3:2021 Cleanrooms and associated controlled environments – Part 3: Test methods
  • NSF/ANSI 49-2019 Biosafety cabinetry
  • GB 50073-2013 Code for design of clean workshop
  • GB 50591-2010 Code for construction and acceptance of cleanroom
  • 2010 GMP for pharmaceutical products-plant and equipment
  • YY0569-2005 Biosafety cabinet
  • JJF 1800-2020 Calibration specification for aerosol photometer
  • JJF 1815-2020 Calibration specification for class II biosafety cabinet
  • AS/NZS 60335.2.69 Testing of M & H Class Vacuum Cleaners
In summary, DOP testing is vital for testing HEPA filters on vacuum cleaners as it ensures their efficiency in capturing small particles, thereby promoting better air quality and user health while ensuring compliance with industry standards and regulations.

Aerosol photometers are devices used for testing and evaluating the performance of filters, particularly those used in air filtration systems. These photometers measure the upstream and downstream concentration of airborne particles, allowing for the assessment of filter efficiency and performance.

Aerosol photometers are also commonly used by testing and certification companies, HEPA filter manufacturers, cleanroom operators and many other organizations. They may be used with or without aerosol generators to make accurate and reliable measurements. Particle counters, ventilation test intruments and other equipment sold by Alpha Scientific is also commonly used by many of these organizations.
Note: While DOP testing is commonly referred to on this page, all of our photometers are typically used with non carcinogenic PAO (poly Alpha Olefin) oil which we can supply and is available through various outlets in Australia.