PMPD 1000

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


PMPD 1000: Ejektor Verdünnungssystem, Ejektorprinzip,  Partikelgrößenverteilung

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.

characteristics dilution systems.JPG (2)

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.


Isokinetic suction nozzles 2 – 5 l/min
Maximum particle size < 10 µm
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 factor 1 : 1,000
Power supply 115 – 230 V, 50/60 Hz
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


Dilution system for PMP measurement chain


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


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