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The PAMAS S50 is a cost-effective, high-performance, laser-based online system with simple integration into industrial data management systems. An automatic digital flow rate determination provides accurate measurement results. The PAMAS S50 counts particles with high resolution in eight particle size channels, available via the data interface for report in real time to the PC. The triple code according to the cleanliness class standard ISO 4406 for the particle sizes > 4 µm(c), > 6 µm(c) and > 14 µm(c) is indicated on the instrument display.


Contamination control and Condition Monitoring of

  • hydraulic oil systems
  • lube oil systems
  • test rigs
  • parts cleaning

Standards and methods

ISO 11171 ISO 4402 ISO 4406 SAE AS4059    

Pressure range and Sample flow

Pressure range without pump: min. 0.2 to max. 15 bar
Pressure range with additional pump: 0 to 6 bar
Flow: 5 to 50 ml/min, depending on system pressure


Up to 1000 cSt, depending on system pressure

Volumetric particle sensor: PAMAS HX

Maximum particle concentration: 24.000 particles per ml at a coincidence quote of 7.8% and a flow rate of 25 ml/min
Calibration range: 4 µm(c) to 70 µm(c) according to calibration standard ISO 11171
Measurement in eight size channels: > 4 µm(c), > 6 µm(c), > 10 µm(c), > 14 µm(c), > 21 µm(c), > 25 µm(c), > 38 µm(c) and > 70 µm(c)
Report of measuring results according to cleanliness class standards SAE AS 4059 and ISO 4406. Particle counter measures ISO classes from 0 to 22.

Interfaces for data transfer

Standard equipment: RS485
Optional equipment: analogue 4-20 mA interface. Parallel data transmission for the size channels > 4 µm(c), > 6 µm(c), > 14 µm(c) and > 70 µm(c) or serial data transmission for all eight size channels.


PAMAS S50P: Online particle counter with integrated pump for flow control to a constant flow of 25 ml/min.


Device with similar application


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