DIL 546/B Dilution System

DIL 546/B Dilution System for static dilution (1:10) of aerosols at static air flow rate (2,83 L/min) with pneumatic-induced switch

To solve specific measuring tasks, the DIL 54X/B Dilution System serves for a defined and reproducible adjustment of the particle concentration in aerosols. Depending on the model, the dilution factor is calibrated at the factory. The dilution can also be bypassed by a pneumatically operated bypass circuit.

Optical particle counters have a maximum measurable particle concentration. If this is exceeded, the particle counter will fail to measure. By connecting a DIL 54X/B dilution system upstream of the particle counter, the aerosol concentration can be reduced by a dilution factor of 1:100 or 1:10. Due to the possibility of bypassing the dilution, the DIL 54X/B can be connected in series with other dilution systems of the DIL 54X/B series. This means that higher dilution factors can also be set. The bypass is pneumatically controlled.

Standards

VDI 3491-6

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Benefits

pneumatic-induced switching for measuring non-diluted and diluted aerosols
constant and reproducible aerosol dilution even under changing operation conditions
internal monitoring of the dilution ratio and visualisation
long-term lifetime, minimum maintainance required
precice operation for both overpressure and underpressure
precice operation for both overpressure and underpressure

Applications

evaluation of filtration separation efficiency

Principle

From the aerosol flow to be diluted, a sample is passed through a thin capillary. The particle concentration of the capillary flow rate remains unchanged, whereas a HEPA filter removes nearly all particles from the bypassing flow rate. After the capillary and filter both flows are remixed. The dilution ratio results from the ratio between the two single flow rates.

Technical data

Parameter title	Unit	Value
purpose of conditioning	-	dilution of aerosols
sample condition, outlet	-	diluted aerosol
dilution factor	-	10
aerosol, volumetric flow rate	L/min	2,83
setting method	-	automatic, controlled
sample condition, inlet	-	non-diluted aerosol
operating medium, gas/air	-	particle-free, dry compressed air
operating medium, gas/air - compressed air supply	bar	max. 6
power supply	-	12 ... 24 V DC, 30 mA
hose connector	mm	Ø 8 (optional Ø 10)
environmental condition, temperature	°C	10 ... 50
noise emission	dB(A)	max. 70
dimensions (w × h × d)	mm	110 × 160 × 310
weight	kg	1,5