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Development of ASTM International D8405-Standard Test Method for Evaluating PM2.5 Sensors or Sensor Systems Used in
Wilton Mui1, Xiaobi Michelle Kuang1, Hang Zhang1
1South Coast Air Quality Management District, Diamond Bar, California.
Journal of Occupational and Environmental Hygiene
|May 15, 2023
Summary
A new standard test method, ASTM D8405, rigorously evaluates indoor air quality sensors for fine particles (PM2.5). This method ensures accurate monitoring for better management of indoor air pollutants.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Sensor Technology
Background:
- Real-time monitoring of fine particles (aerodynamic diameter < 2.5 µm) is essential for assessing indoor air quality.
- Accurate and reliable sensors are critical for effective management of indoor air pollutant concentrations.
- Standardized verification protocols are needed to ensure the performance and accuracy of indoor air quality sensors.
Purpose of the Study:
- To introduce and detail a new, exacting standard test method for evaluating indoor air quality sensors and sensor systems measuring fine particles.
- To provide a comprehensive laboratory protocol for assessing sensor performance under various conditions.
- To establish a benchmark for the rigorous evaluation of PM2.5 sensors.
Main Methods:
- Development of ASTM D8405, a new standard test method for indoor air quality sensors.
- Implementation of a five-phase testing protocol: initial ramp, environmental conditions (temperature/humidity), interfering particles, temperature cycling, and final ramp to assess drift.
- Laboratory-based evaluation of sensors and sensor systems measuring particles smaller than 2.5 µm in diameter.
Main Results:
- ASTM D8405 represents the most exacting laboratory protocol to date for evaluating indoor air quality sensors for fine particles.
- The standard subjects sensors to a comprehensive range of tests to assess accuracy and performance.
- Example evaluation results and comparisons with peer protocols are discussed.
Conclusions:
- The newly developed ASTM D8405 standard provides a robust framework for verifying the performance of indoor air quality sensors.
- This standard is crucial for ensuring the reliability of real-time indoor air quality monitoring systems.
- Adoption of ASTM D8405 will enhance confidence in sensor efficacy for managing indoor air pollutants.
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