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Application Note

Understanding ISO 21501-4 (el)

Abstract

ISO 21501 has the title Determination of particle size distribution—Single particle light interaction methods. Included with ISO 21501 are four parts, of which only Part 4 will be discussed in this paper:

  • Part 1: Light scattering aerosol spectrometer
  • Part 2: Light scattering liquid-borne particle counter
  • Part 3: Light extinction liquid-borne particle counter
  • Part 4: Light scattering airborne particle counter for clean spaces

The documentation and approval of ISO 21501-2, -3, and -4 subsequently replaces and cancels ISO 13323- 1:2000. The ISO 21501 standard widens the scope of analysis to include methodology for airborne particle counting and liquid particle counting (both light scattering and extinction methods). Specifically, ISO 21501-4 provides a calibration procedure and verification method for airborne particle counters to minimize inaccurate measurements and reduce variations between different instruments. These new guidelines require pulse height analysis (PHA) for particle counter calibrations, which reduces inconsistencies.

Interested in learning more? Complete the form on this page to receive a free copy of the Understanding ISO 21501-4 application note.

 

Your Understanding ISO 21501-4 application note is ready for downloading.

                    Download now      

Here is a product you might be interested in: Lasair III Aerosol Particle Counter, it is a portable aerosol particle counter that meets the requirements of ISO 21501-4 and 14644-1. It sets the standard for highly regulated environments, so you can accurately see if your environment is clean.

Do you need more guidance on selecting the right particle counter for your application needs? Complete our form and a PMS representative will contact you within three business days.

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  • Microbial Samplers
  • BioCapt®Certificates of Analysis
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  • Parts Cleanliness Testing
  • Annex 1 Latest Draft Revision Updates

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Particle Measuring Systems- DK

Particle Measuring Systems Nordic
Korskildelund 4-6
2670 Greve, Denmark

T. +45 7070 2855
[email protected]

Keep in touch! Receive industry news from us:

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