The PAMAS S4031 GO is a portable particle counter that is integrated in the rugged case PAMAS GO specially developed and designed for harsh environments. It can be used for batch sampling or for online measurements. A wear resistant ceramic piston pump guarantees a constant flow. With a simple-to-use touch screen user interface operation is easy and intuitive. Up to 32 free adjustable size channels may be selected and stored in the system. The system is equipped with an integrated battery for more than three hours operation and data storage of more than 4000 measurements. Real time sample measurement data can be printed during the analysis and also be revisited and printed at anytime at a later date.


  • Water

  • Suspensions

  • Cleaning fluids

  • Sea and brackish water

  • Corrosive fluids

  • Hydraulic Oil

  • Turbine and insulation oils

  • Gear and motor oils

  • Fuels

  • Phosphate ester based hydraulic fluids

  • Water based hydraulic fluids

Volumetric sensors

Available size ranges:

  • 1–200 μm (ISO 21501-3)

  • 4–70 μm(c) (ISO 11171)

  • 2–100 μm (ISO 4402)

    Max. particle concentration: 24,000 P/ml* at 25 ml/min**

Available size ranges:

  • 1–200 μm (ISO 21501-3)

  • 1–100 μm (ISO 4402)

  • 4–70 μm(c) (ISO 11171)

    Max. particle concentration: 120,000 P/ml* at 25 ml/min** Other sensors for larger particle sizes or higher concentrations are available on request.

Standards and methods
ISO 11171 ISO 4402 ISO 4406 SAE AS4059 NAS 1638 GOST 17216
GJB 420B
GJB 420A
NAVAIR 01-1A-17*
SAE 749D*
ISO/DIS 11218.2*
ASTM D7647
IEC 60970
ASTM D6786
ISO 11500

* in connection with PAMAS PMA software.