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Model 602 BetaPLUS

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Particle Measurement System

US EPA approval for PM2.5 (EQPM-0912-204), PM10 (EQPM-0912-205), and PM10-2.5 (EQPM-0912-206)

The Model 602 BetaPLUS Particle Measurement System is the first to receive US EPA Federal Equivalent Method (FEM) designations for all three PM parameters in a single, dual-channel instrument. The instrument is also available in a single channel configuration, retaining either PM10 or PM2.5 US EPA FEM designation depending on the inlet configuration.

The instrument combines sequential sampling with automated mass measurements to provide hourly results for two separate channels simultaneously. Following the internal mass measurements, the sample filters can be transported to a laboratory for further chemical speciation analysis if needed.

For regulatory compliance applications, time synchronizing the instrument with the Federal Reference Method (FRM) leads to closely matching results regardless of location and without the need for any corrections or internal adjustment factors. A patented multistep analysis process eliminates common measurement artifacts such as humidity and background radiation.

The Model 602 BetaPLUS Particle Measurement System represents a significant advancement in atmospheric particulate matter air monitoring, satisfying the data quality requirements of both monitoring agencies and public health researchers. The system is backed by Teledyne API’s world renowned customer service and technical support.


  • Available in single or dual-channel configurations
  • US EPA Federal Equivalent Method (FEM) Certifications for PM10, PM2.5 and PM10-2.5*
  • One or two independent sampling lines with a single beta attenuation-based mass sensor
  • Collect samples onto 47mm Ø filters for preservation and subsequent chemical analysis
  • >95% active sampling per measurement cycle
  • Accurate hourly results using direct beta attenuation mass measurement
  • Automatic flow and mass sensor verifications
  • Uses spy filter to counteract humidity interference
  • Digital and analog communications
  • Remote monitoring, data retrieval, and control
  • Two-year warranty

*US EPA PM10-2.5 certification applies to dual-channel configuration only.

Method Designations:

US EPA PM10 Federal Equivalent Method (EQPM-0912-205)
US EPA Class III PM2.5 Federal Equivalent Method (EQPM-0912-204)
US EPA Class III PM10-2.5 Federal Equivalent Method (EQPM-0912-206) - dual-channel only
EN12341 PM10 and EN14907 PM2.5 Certified Equivalent Methods (TÜV Certificate 0000028733)


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Teledyne API • 9970 Carroll Canyon Road • San Diego, California 92131 • USA