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DIL 546/C

DIL 546/C Dilution System for controlled static dilution (1:10) of aerosols at static air flow rate (3 L/min), digital status communication

The self-adjusting DIL 546/C Dilution System is used to defined and reproducible adjustment of the aerosol particle concentration (dilution).
Dilution System for Aerosols DIL 540, front view
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.

Standards

VDI 3491-6
ISO 14644-3
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Benefits

  • dilution ratio is automatically adjusted
  • mobile use (no compressed air supply is required, battery operation possible)
  • 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
  • high durability and reliability, minimum maintenance
  • over- and under-pressure operation is permitted
  • adaptation to customer-specific requirements (dilution ratios) possible
  • can be operated in connection of series

Applications

  • 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

A partial stream is extracted from the raw aerosol flow. The particle concentration in the partial flow (capillary volume flow) will remain unchanged. A HEPA filter is used for separation of particles from the by-pass flow. The two flows are recombined. Dilution results from the ratio of the total flow to the capillary volume flow.

The fluidic design of the device ensures isokinetic sampling at the inlet of the capillary. Interferences of particle size distribution of the aerosol through diluting are therefore minimal.

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 54X upstream of the particle counter, the aerosol concentration can be reduced by a factor of 10.

Parameter title Unit Value
setting method - automatic, controlled
aerosol, volumetric flow rate L/min 2,83 (3,0)
dilution factor - 10
sample condition, outlet - diluted aerosol
purpose of conditioning - dilution of aerosols
power supply - 12 V DC; 0,1 A (optional battery operation)
sample condition, inlet - non-diluted aerosol
weight kg 1,5
dimensions (w × h × d) mm 110 × 160 × 300
environmental condition, max. counterpressure kPa ± 20
environmental condition, temperature °C 10 ... 50
pressure drop kPa 0,8 ... 1,3
hose connector, outlet mm Ø 8 (optional Ø 10)

Silimar products

DIL 541/C

DIL 541/C Dilution System for controlled static dilution (1:10) of aerosols at static air flow rate (28,3 L/min), digital status communication

Dilution System for Aerosols DIL 541, front view
detail view

DIL 540/C

DIL 540/C Dilution System for controlled static dilution (1:100) of aerosols at static air flow rate (28,3 L/min), digital status communication

Dilution System for Aerosols DIL 540/C, front view
detail view

DIL 545/C

DIL 545/C Dilution System for controlled static dilution (1:100) of aerosols at static air flow rate (3 L/min), digital status communication

Dilution System for Aerosols DIL 540, front view
detail view