ASTM WK62732

    New Test Method for Evaluating PM2.5 Sensors or Sensor Systems Used in Indoor Air Applications

    (What is a Work Item?)

    Developed by Subcommittee: D22.05 | Committee D22 | Contact Staff Manager


    1. Scope

    1.1 This test method uses a chamber system equipped with a reference monitor to evaluate the performance of stationary indoor air quality particle sensors (sensors) and particle sensor systems (sensor systems) used for PM2.5 detection and measurement. Sensors or sensor systems are evaluated against a reference monitor to assess the relative performance of the sensor or sensor system when subjected to various tests, such as varying temperature between 20 and 50C, relative humidity from 40 to 80 %, PM2.5 concentration from a reference monitors lower limit of detection to 300 g/m3, and coarse PM interferent concentration from 10 to 150 g/m3, as reported by the reference monitor. Organic and inorganic surrogate test particles are used in performing these tests and results are expressed as percent difference from a reference monitor. 1.1.1 This test method is not intended to evaluate indoor air quality sensors and sensor systems for purposes of homeland security or other law enforcement or forensic activity. 1.1.2 This test method evaluates the performance of sensors and sensor systems that allow users to collect recorded data obtained in a systemic manner that provides for comparison of the capabilities and limitations of these devices. This test method is not meant to evaluate sensors or sensor systems without data storage and recording capabilities. 1.1.3 This test method evaluates the performance of sensors and sensor systems that can be continuously powered and operated in data collection mode for the duration of any test in this method. Sensors and sensor systems shall be powered either through line power or an internal battery of sufficient output to operate properly. This test method is not meant to evaluate sensors or sensor systems without these capabilities. 1.2 Units--The values stated in SI units are to be regarded as the standard. Other units present in this standard are for information only. 1.3 This standard does not purport to address all the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    indoor air quality; sensors; sensor systems; aerosol; PM2.5; ventilation; particles; chamber


    Based on falling costs, consumer-grade IAQ sensors and sensing devices are gaining wide adoption for reporting on IAQ conditions and also controlling ventilation systems. Better information is needed with respect to the performance of these sensors so that users can make informed decisions regarding their selection and specification. The primary anticipated users are expected to be IAQ sensor and sensing device manufacturers, smart ventilation system manufacturers, and laboratories. This standard is likely to be referenced in standards and codes that address IAQ in buildings, such as ASHRAE 62.2, ASHRAE 62.1, the International Residential Code, the International Mechanical Code, and California Title 24.

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:

    Technical Contact:
    Joseph Nebbia


    D22 (21-04)

    Ballot Item Approved as D8405-2021 and Pending Publication