PMPD 1000

Dilution system ejector for the PMP application with dilution factor 1:1000


Brief Description
Brief product description in two-pages as PDF
Product Description
Detailed product description as PDF

PMPD 1000

Dilution system ejector for the PMP application with dilution factor 1:1000


The PMPD 1000 dilution system is a dilution system according to the ejector principle that was especially developed for the PMP application or the PMP measurement chain. The PMPD 1000 achieves a dilution factor of 1:1000 (see Figure 1) by means of a thermodiluter up to 200°C.

PMPD 1000_Skizze_eng.jpg

Fig. 1: PMPD 1000

The PMPD dilution systems offer all the advantages of the other Palas® product series of ejector diluters, e.g. a temporally constant dilution factor.

The suitability of the PMPD 100 for the PMP measurement chain was confirmed at the METAS Institute in Switzerland (see measurement report no. 235-10383). The PMPD 1000 cascades a further dilution step as compared with PMPD 100.

Representative dilution of particle size distribution of the Palas® dilution systems by cascading

VDI report no. 1973 from 2007 proved metrologically that a reproducible aerosol dilution is possible with the Palas® dilution systems down to VF 100,000.

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Table 1: Technical characteristics of Palas® dilution systems


  • The dilution systems from Palas® are clearly characterized. This is proven by means of a calibration certificate for each individual device.
  • The dilution steps of the PMPD series produce a temporally constant, representative dilution with factor 100 / 1000.
  • Low compressed air consumption (e.g. only 96 L/min. for a dilution factor of 1000 with four VKL 10 systems)
  • The dilution steps can be combined with all common particle counters.


Power supply

115 – 230 V, 50 – 60 Hz
Dilution factor 1 : 1000
Isokinetic suction nozzles 2 – 5 l/min
Maximum particle size

< 10 µm
Special features 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
Thermodynamic conditions for dilution

≤ 400°C
Volume flow (clean air)
54 – 135 l/min (heated to 200 °C)
Volume flow (suction flow) 2 – 5 l/min
Compressed air supply 4 – 8 bar


Dilution system for PMP measurement chain


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