DIL 540 – Self Adjusting Dilution

DIL 540 – Self Adjusting Dilution

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.

  • Dilution ratio is automatically adjusted
  • Mobile use by battery operation

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.


  • Directing the entire intake volume flow of the particle counter from the sampling point via the dilution system (closed system)
  • Constant, reproducible dilution even under changing operating conditions
  • Internal monitoring of the dilution ratio with display
  • Mobile use (no compressed air supply is required, battery operation possible)
  • High durability and reliability, minimum maintenance
  • Over- and under-pressure operation is permitted
  • Adaptation to customer-specific requirements (dilution ratios) possible


  • Verification of the test aerosol for testing cleanroom installations
  • Acceptance measurements of laminar flow boxes, safety cabinets and smaller clean rooms
  • Determination of filter separation efficiencies
  • Measurement of highly concentrated aerosols
  • Aerosol research