Dilution Systems

In practice, the aerosols to be measured very often have to be made measurable for the particle measurement devices with regard to the particle concentration by dilution.The ejector principle is the classic among the dilution systems and is described in VDI 3491-15. It is particularly characterized by the combination (cascadability) of the individual dilution levels, which means that dilution factors of 10, 100, 1,000, 100,000 and 1,000,000 can be set reliably.Depending on the model variant, the dilution levels for isothermal dilution of hot aerosols can be heated up to 200 °C. Stainless steel models can be designed pressure-resistant up to 10 bar overpressure and are used worldwide with great success for the measurement of chemically aggressive aerosols.The Palas® dilution systems are robust, easy to use and provide a clearly defined dilution factor. The dilution factors can be checked by the user on site. Differences between dilution systems   DC 10000 KHG 10 PMPD 100 VKL 10 VKL 100 Power supply 115 – 230 V, 50 – 60 Hz 115 – 230 V, 50 – 60 Hz 115 – 230 V, 50 – 60 Hz Dimensions approx. 500 • 230 • 150 mm (H • W • D) 100 • 245 • 100 mm 100 • 245 • 100 mm Weight approx. 10 kg approx. 4 kg approx. 4 kg Dilution factor 1 : 10 1 : 100 1 : 1,000 1 : 10,000 1 : 10 1 : 100 1 : 10 1 : 100 Maximum particle size < 5 µm < 20 µm (für Stäube) < 10 µm < 20 µm (for dusts) < 2 µm (for dusts) Special features Heatable until 150 °C, cascadable, chemical resistant Evaporation of volatile elements for exhaust emission measurements according to VPR Calibration Procedure AEA/ED 47382/Issue 5 (Volatile Particle Removal Efficiency), chemical resistant, heated to 200 °C Cascadable Cascadable Volume flow (suction flow) 2 – 5 l/min 2 – 5 l/min 2 – 5 l/min 2 – 5 l/min 0.15 - 0.5 l/min Compressed air supply 4 – 8 bar 4 – 8 bar 4 – 8 bar 4 – 8 bar

Team

DC system

Dilution cascade with electrically operated pump to dilute highly concentrated aerosols with selectable dilution factors

Job Role

KHG system

Cascadable and heatable ejector dilution system, also in overpressure up to 10 bar.

Role

LDD System

New dilution system for droplets and dusts up to 10 µm developed

Experience Content

PMPD system

Dilution system to remove volatile particles and to dilute highly concentrated aerosols for PMPD applications

Experience

VKL system

Cascadable ejector dilution system for dilution factors of 10 – 1,000,000 also in overpressure up to 10 bar

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