Particle Pal Plus High Viscosity + Water RH%: Digital Imaging Portable Particle Counter

  • Particle Pal Plus logo
  • FS9V4-RH-HV

Portable Particle Counting and Water Sensing up to 2,400cSt

Our all new Particle Pal Plus high viscosity with water sensing has the same functionality as our FS9V4-RH but with an advanced stepper motor pump that can handle oils from 1cSt up to 2,400cSt. This version of the Particle Pal Plus has a larger HMI screen and larger robust case.


  • Close up image of particulate

Harnessing the power of proven digital imaging with water sensing technology and a high viscosity pump.

The S120 Digital imaging particle counter reports ISO 4406 counts as well as 4, 6, 14, 21, 38 & 70 micron sizing and bubble elimination. Digital imaging, sorts particles into fatigue wear, cutting wear and sliding wear categories to give root cause analysis. This powerful technology, when coupled with an additional sensor for measuring water content as %RH (Relative Humidity - 100% RH = saturation) gives unprecedented, on-the-spot insight into the condition of your oil.

The image to the right is representative of an image captured from the S120 particle counter. Images are not displayed on the LCD screen.

Built-in Display

  • FS9V4 Screenshot
    FS9V4 Screenshot
  1. Clear and easy to read ISO code which changes between green, white and red to indicate the oil cleanliness.

  2. 1cSt up to 2,400cst viscosity capability.

  3. Oil cleanliness for each size category details the ISO code, the number of particles per millilitre and the bubbles detected.

  4. An additional Water sensor gives an unprecedented insight into the overall condition of the oil.

  5. Additional settings allow control of the pump speed for priming and flushing, datalogging, ISO cleanliness alarm limits and changing the time zone.

  6. Oil cleanliness is trended over time to show how its condition changes.

  7. Particles are analysed and sorted into fatigue wear, cutting wear, sliding wear and fibre identification to give root cause analysis.



  • on mobile

Watch the demo video

Online reporting tool

Particle Pal Plus has the ability to generate a QR code, representing the 5 most recent tests. When scanned on a mobile device this will open a fully tabulated and graphical report based on those readings hosted on After viewing the report you can choose to create or log into your user account, then save your reports.

Additional test information can be added to saved reports for future retrieval, as well as optionally displaying your own company name and logo before being shared with third parties such as your own customers.



Digital Imaging Particulate Counter

Capable of broad size determination from 4, 6, 14, 21, 38 & 70 micron counts. Air bubble and water droplet elimination. Shape determination to identify fatigue, sliding or cutting wear as well as fibre identification. This technology is not affected by phantom particles which is a problem with Laser particle counters (typically oil anti-foaming oil additives cause phantom particles)

Water Sensor

Water in oil is a contaminant that can contribute to microbial growth and encourage further contamination, from solids to rust. The inbuilt water sensor shows the relative humidity of any oil as % saturation for analysing oils.

Internal Stepper Motor Pump

We've developed a fully controllable stepper motor driven pump to deliver exact flow rates for any oil, from 1 to 2,400 cSt. The pump also allows connection to a live system up to 350bar via a high pressure adaptor.

Water content

Displayed as % saturation (relative humidity). Helps inform whether an oil change is actually required.

Battery Life

Internal rechargeable lithium batteries provide up to ten hours of use.

Particulate analysis.

The Atten2 digital imaging particle counter gives advanced size and shape recognition for any sample.    Counting particulate in fuel and virtually any oil up to 320cSt, the Atten2 device also eliminates air bubbles, making it ideal for heavy lube and gear oil applications in cold temperatures. Reporting 4, 6, 14, 21, 38 & 70 micron counts as well as categorising any particle greater than 20 microns into Fatigue Wear, Sliding Wear, Cutting Wear and Fibres.

Particle Pal Plus - Advanced Fluid Analysis - Technical Information

Fluid Compatibility Synthetic Oils, Organic Oils, Mineral Oils & Diesel Fuel (2,400 cSt viscosity limit)
Display Information Particulate: ISO 4406, SAE AS4059 & NAS 1638, bubble elimination and particulate wear analysis.
Water sensing: Water is displayed as relative humidity (RH) % saturation.
Modes of Operation High pressure live system sampling (up to 350 bar) - via a high pressure adaptor.
Bottle sampling and tank sampling.
Data All data stored locally with an option to export to CSV or PDF.