In-Line Sampling Particle Counter

  • Particle Counting Systems

The S4031WG Particle Counter is a portable and compact in-line particle counter suitable for use with water based hydraulic liquids. The S4031WG may also be used as a field friendly bottle sampling particle counter.

Model: S4031WG

  • The volumetric cell design of PAMAS sensors guarantees the highest accuracy, resolution and best statistical information
  • Real portability with lab system accuracy
  • Users can configure the system to their needs
  • High repeatability and reproducibility
  • Shipped in a protective carry case



Printouts according to ISO 4406, SAE AS 4059, NAS 1638

Fluid Compatibility

Water based hydraulic fluids

Viscosity Range

Up to 400 cStokes


1.5 μm(c) according to ISO 11171


Up to 32 free adjustable size channels

Max Rated Pressure

6 Bar (when used in-line)

Liquid Temperature

10 °C – 60 °C

Ambient Temperature

5 °C – 40 °C

Relative Humidity

< 70% RH


100VAC - 240VAC 50 - 60Hz mains supply. Built-in battery for up to 2h operation

User Interface

Fully programmable parameter setup


Printout including all sample parameters, numerical and graphical presentation and all main cleanliness classes.

Internal memory of more than 4000 measurements


USB port


Pamas PMA software available

Dimensions and Weight

300 mm (L) x 140 (W) mm x 300 (H) mm, 9kg

Particle Counting Systems