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Air quality sensors
Air quality sensors
Citizens may use air sensors to get more information on the air quality around them. Sensors are affordable, portable, and easy to use. The information they provide can help the public learn more about air quality in their communities. These sensors have their limitations. They cannot be used in place of regulatory-grade monitoring instruments and cannot tell if a specific company is complying with air quality rules and regulations.
The air sensor technology market is expanding as more companies make lower-cost portable sensors available to the public. The information outlined below provides the public with best practices for using low-cost, portable air sensors. It may be used to assist citizens with setting up sensors, evaluating the data collected, and interpreting the results.
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USEPA Resources
EPA has resources about air sensors to help citizen scientists understand what sensors can be used to measure different pollutants and how to understand the results.
The EPA provides a comprehensive toolbox of low-cost, portable sensor information.
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PurpleAir sensors
At EGLE we use PurpleAir sensors in several locations around the state. PurpleAir sensors are low-cost and easy to use. Comparability studies found that the data associated with the PurpleAir sensors can compare more accurately with federal reference method samplers by applying a predetermined, local correction factor. There are three correction factors currently available on the PurpleAir website. The EPA correction factor offers the most applicable broad-scale conversion factor currently available on the website.
Measurements from PurpleAir sensors are used in USEPA’s Fire and Smoke map. The map helps the public see the current Air Quality Index, concerning fine particulates called particulate matter less than 2.5 microns in diameter (PM2.5).
EGLE has several sensors reporting data to the Purple Air system. These are EGLE-Port-Huron-002, EGLE- Atwater-008, EGLE -Warren-DO-004, EGLE-CadillacPlace-003, EGLE-Mt Pleasant-Chippewa-005, EGLE-Alpena-001, EGLE -Palmer-007 and EGLE-Flint FHC-009.
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AirBeam portable air quality sensor
AirBeam is a palm-sized air quality instrument that measures hyperlocal concentrations of harmful microscopic particles in the air, known as particulate matter, as well as humidity and temperature. The AirBeam measures particulate matter with proven accuracy and when used in conjunction with the AirCasting platform helps community-based organizations, educators, academics, regulators, city managers, and community scientists map air pollution and organize for clean air.
These are the same sensors that EPA lends out through the Air Sensor Loan Program for Remote/Rural Locations in Michigan. This sensor makes a great place-based, hands-on companion to our MEECS air quality unit!
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Other state resources
California - South Coast Air Quality Management District
The South Coast Air Quality Management District (AQMD) established the Air Quality Sensor Performance Evaluation Center (AQ-SPEC) program to provide guidance and inform the public about the performance of low-cost air sensors.Wisconsin - Deigning an Ambient air Monitoring study
The Wisconsin DNR has assembled a road map, entitled Considerations When Designing an Ambient Air Monitoring Study, for setting up an air monitoring project.Other Wisconsin DNR resources to review are:
- Quality Assurance Project Plan for PurpleAir Sensor Study (QAPP 111.0)
- 2019 PurpleAir Comparison Study
Contact
James Voss, Air Sensor Unit Manager, VossJ1@Michigan.gov or 313-790-4894