Standard Test Method for Evaluating PM<inf>2.5</inf> Sensors or Sensor Systems Used in Indoor Air Applications

SIGNIFICANCE AND USE
5.1 Poor indoor air quality has been implicated in significant adverse acute and chronic impacts on occupant health and performance. The ability to assess the components contributing to poor indoor air quality is critical for determining best practices for improving indoor air quality.  
5.2 Measurement of pollutants in indoor environments using sensors and sensor systems provides information needed to improve indoor air quality through pollutant source control, ventilation, filtration or other treatments.  
5.3 This method uses a test characterization chamber system equipped with reference monitor(s) to evaluate the response of test sensors or test sensor systems to specific types of particles (for example, salt, polystyrene latex, or dust). To facilitate reproducible results, the test particles used within this method are standardized and have known properties. The user is cautioned that a single particle type is not representative of all particles found indoors. The relative response of test sensors or test sensor systems to a reference monitor can vary by a factor of two for different particle types (for example, primary or secondary, organic or inorganic, outdoor or indoor origin; see 6.11.3 for further discussion). Furthermore, the user is cautioned that the lower limit of particle size detection for optical test sensors and test sensor systems is generally 0.3 μm in diameter; particles below this size are generally undetected and may represent a significant health concern as well.
SCOPE
1.1 This test method uses a chamber system to evaluate the performance of stationary PM2.5 sensors (sensors) and particle sensor systems (sensor systems) subjected to various test conditions, including temperature, relative humidity, PM2.5 concentration, and coarse PM interferent concentration.  
1.1.1 This test method covers sensors and sensor systems that can be continuously powered and continuously operated for the duration of any test described in this method through line power or an internal battery of sufficient output. This test method is not meant to evaluate sensors or sensor systems without these capabilities.  
1.1.2 This test method evaluates the performance of sensors and sensor systems that allow users to collect data in a systemic manner to assess the capabilities and limitations of these devices.  
1.1.3 This test method is not meant to evaluate sensors or sensor systems without data storage and recording capabilities.  
1.1.4 This test method is not intended to evaluate indoor air quality sensors and sensor systems for purposes of regulation of outdoor air, homeland security, law enforcement or forensic activity.  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Aug-2021
Technical Committee
Drafting Committee
Current Stage
Ref Project

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ASTM D8405-21 - Standard Test Method for Evaluating PM<inf>2.5</inf> Sensors or Sensor Systems Used in Indoor Air Applications
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D8405 − 21
Standard Test Method for
Evaluating PM Sensors or Sensor Systems Used in
2.5
1
Indoor Air Applications
This standard is issued under the fixed designation D8405; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This test method uses a chamber system to evaluate the
mendations issued by the World Trade Organization Technical
performance of stationary PM sensors (sensors) and particle
2.5
Barriers to Trade (TBT) Committee.
sensor systems (sensor systems) subjected to various test
conditions, including temperature, relative humidity, PM
2.5
2. Referenced Documents
concentration, and coarse PM interferent concentration.
2
2.1 ASTM Standards:
1.1.1 This test method covers sensors and sensor systems
D1356 Terminology Relating to Sampling and Analysis of
that can be continuously powered and continuously operated
Atmospheres
for the duration of any test described in this method through
D3670 Guide for Determination of Precision and Bias of
line power or an internal battery of sufficient output. This test
Methods of Committee D22
method is not meant to evaluate sensors or sensor systems
D6330 Practice for Determination of Volatile Organic Com-
without these capabilities.
pounds(ExcludingFormaldehyde)EmissionsfromWood-
1.1.2 This test method evaluates the performance of sensors
Based Panels Using Small Environmental Chambers Un-
andsensorsystemsthatallowuserstocollectdatainasystemic
der Defined Test Conditions
manner to assess the capabilities and limitations of these
E691 Practice for Conducting an Interlaboratory Study to
devices.
Determine the Precision of a Test Method
1.1.3 This test method is not meant to evaluate sensors or
E3080 Practice for Regression Analysis with a Single Pre-
sensor systems without data storage and recording capabilities.
dictor Variable
1.1.4 This test method is not intended to evaluate indoor air
3
quality sensors and sensor systems for purposes of regulation
2.2 International Standards Organization (ISO) Standards:
of outdoor air, homeland security, law enforcement or forensic
ISO 8573-1 Requirements for the purity of compressed air
activity.
with respect to particles, water, and oil
ISO 12103-1 Road vehicles — Test contaminants for filter
1.2 The values stated in SI units are to be regarded as
evaluation — Part 1: Arizona test dust
standard. The values given in parentheses after SI units are
ISO 17025 General requirements for the competence of
provided for information only and are not considered standard.
testing and calibration laboratories
1.3 The text of this standard references notes and footnotes
2.3 United States (U.S.) Code of Federal Regulations
that provide explanatory material. These notes and footnotes
4
(CFR):
(excluding those in tables and figures) shall not be considered
Title 40 Part 53 Requirements for ambient particulate instru-
as requirements of the standard.
ments to attain U.S. Environmental Protection Agency
1.4 This standard does not purport to address all of the
(EPA) Federal Equivalent Method (FEM) designations
safety concerns, if any, associated with its use. It is the
Title 40 Part 58 Terminology relating to particulate matter
responsibility of the user of this standard to establish appro-
fractions
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
dance with internationally recognized principles on standard-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Available from International Organization for Standardization (ISO), ISO
1
This test method is under the jurisdiction of ASTM Committee D22 on Air Central Secretariat, Chemin de Blandonnet 8, CP 401, 1214 Vernier, Geneva,
Quality and is the direct responsibility of Subcommittee D22.05 on Indoor Air. Switzerland, https://www.iso.org.
4
Current edition approved Sept. 1, 2021. Published October 2021. DOI: 10.1520/ Available from U.S. Government Publishing Office (GPO), 732 N. Capitol St.,
D8405-21. NW, Washington, DC 20401, http://www.gpo.gov.
Copyright © ASTM International,
...

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