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The Self-Adjusting Dilution System DIL 540 enables defined and reproducible adjustment of the aerosol particle concentration (dilution). It is particularly useful for the verification of the test aerosol for testing cleanroom installations . In the standard EN ISO 14644-3, this is included as a requirement.
Optical particle counters have inherently a maximum measurable particle concentration. If this is exceeded, errors are to be expected for reasons of coincidence in the measurement volume of the counter.
By placing the dilution system DIL 540 before the particle counter, the aerosol concentration can be reduced by a factor of 100.