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The online particle counter PAMAS OLS4031 emerged from the standard particle counter PAMAS S4031. The standard shell is made of coated steel. For Phosphat-Ester applications, the PAMAS OLS4031 is manufactured with a special stainless steel shell that protects the housing from corrosive liquids. The integrated stepper-motor-driven pump guarantees a constant flow. The PAMAS OLS4031 online particle counter is equipped with 32 size channels.


The PAMAS OLS4031 is used in monitoring facilities systems in the aircraft industry, in test rigs for parts cleanliness and in production test lines.

Standards and methods

ISO 11171 ISO 4402 ISO 4406 SAE AS4059 NAS 1638 GOST 17216
CHARN* GJB 420B GJB 420A NAVAIR 01-1A-17* SAE 749D* ISO/DIS 11218.2*

* in connection with PAMAS PMA software

Sample input

Low pressure (standard version): 0 to 6 bar - online mode
High pressure (available on request): 3 to 420 bar - online mode

Sample viscosity

Up to 200 cSt
Pressurised up to 350 cSt

Volumetric particle sensor PAMAS HCB-LD-50/50

Nominal flow rate: 25 ml/min, maximum particle concentration: 24.000 p/ml at a coincidence quote of 7.8%


PAMAS PMA: Particle Measuring and Analysing Software



PAMAS Partikelmess- und Analysesysteme GmbH
Dieselstraße 10
D-71277 Rutesheim / Deutschland

Phone +49 7152 9963-0
Fax +49 7152 9963-32
E-Mail info@pamas.de