A new ASTM International standard test method (ASTM D8405) was created for this need and is the most exacting laboratory protocol published to date for evaluating indoor air quality sensors and sensors systems measuring particles smaller than 2.5 µm in diameter.  ASTM D8405 subjects sensors and sensor systems to five test phases: 
ASTM D8405
Development of ASTM international D8405 - Standard test method for evaluating PM2.5 sensors or sensors systems used in indoor applications.Sensors and sensor systems for monitoring fine particles with aerodynamic diameter smaller than 2.5 µm can provide real-time feedback on indoor air quality, and thus can help guide actions to manage indoor air pollutant concentrations.  A new ASTM International standard test method (ASTM D8405) was created for this need and is the most exacting laboratory protocol published to date for evaluating indoor air quality sensors and sensors systems measuring particles smaller than 2.5 µm in diameter. 
ASTM International
A new ASTM International standard test method (ASTM D8405) was created for this need and is the most exacting laboratory protocol published to date for evaluating indoor air quality sensors and sensors systems measuring particles smaller than 2.5 µm in diameter.  ASTM D8405 subjects sensors and sensor systems to five test phases: 
ASTM D8405