Particle counter for the remote on-site analysis of fluid samples – pressureless sampling and up to 420 bar system pressure testing.

The PAMAS S40 is a portable particle counting system for oil-based liquids like hydraulic and lubricating oil. A wear resistant ceramic piston pump guarantees a constant flow. With a simple-to-use touch screen user interface, operation is easy and intuitive. The system is equipped with an integrated battery for up to three hours operation and a data storage of up to 4000 measurements. The system can be used for batch sampling and online measurements. Additional accessories are available.

This video presents the products features of the PAMAS S40 portable particle counter.


  • Hydraulic oils

  • Turbine and insulation oils

  • Gear oils

  • Phosphate ester based hydraulic fluids

  • Fuels


  • PAMAS S40 Standard for the measurement at up to 420 bar system pressure

  • PAMAS S40 Lube Oil for the measurement of highly viscous oil of up to 1,000 cSt

  • PAMAS S40 Fuel for the measurement of fuels such as petrol, diesel or kerosene

  • PAMAS S40 Skydrol for the measurement of phosphate ester based hydraulic fluids

  • PAMAS S40 AVTUR for the measurement of turbine fuel according to EI-IP 577 and DEFSTAN 91-091 as well as diesel according to IP PM FA

Product features

  • Robust & convenient design

  • Lightweight only 8 kg

  • Customizable measurement analysis settings

  • Intuitive operation via touch screen

  • Automatic sample flow and volume control by wear resistant ceramic piston pump

  • Measurement from pressureless up to 420 bar system pressure

  • Pressureless measurement of fluids with viscosities of up to 1.000 cSt at 22°C (equal to ISO VG320) without the need for accessories

  • Use of any sample vessel (any customer specific or widely available containers)

  • Internal data storage of more than 4,000 measurements

  • Measurement printout via integrated thermoprinter

  • Same measurement accuracy as a laboratory unit

  • Multilingual menu navigation

  • Battery running time of more than 4 hours

Volumetric Sensor


Available size ranges:

  • 4–70 µm(c) (ISO 11171)

  • 2–100 µm (ISO 4402)

  • Max. particle concentration: 24.000 P/ml at 25 ml/min 

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.