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FS9V2-RH: PARTICLE PAL with accurate Water %RH

FS9V2-RH: PARTICLE PAL with accurate Water %RH

The All new FS9V2-RH unit displays live Particulate as ISO/NAS/SAE standards as well as water %RH levels in diesel fuels.

We have further developed the award-winning Particle Pal by integrating a water monitor that displays water content as %RH for diesel fuels, this highly accurate sensor is temperature compensated for giving more accurate results.

Why is water level measurement so important?

Most fuels have a maximum allowable water content level. When water levels exceed this value, whether as emulsified, entrained or free water, moisture-related problems are inevitable, such as:

  • Fuel Oxidation

  • Formation of paraffin and asphalt long chain polymers
  • Microbial growth and associated contamination
  • Additive depletion

  • Acid formations

  • Gel Formations

The Particle Pal RH is a self-contained field kit with an integrated pump and rechargeable battery. Giving live readings of both solid contamination and water content can rapidly help determine if your diesel fuel is fit for purpose.

To find out how the Particle Pal can benefit you, please contact one of our expert team to discuss further.

Particle Pal Range

Please click on the links below to see the other Particle Pal models in the range:

FS9V2 Particle Pal: Live ISO/NAS/SAE particulate readings (a version for oils and fuels)
FS9V2-RH Particle Pal: Live Particulate and % RH Water detection
New: Particle Pal Life Particulate, Water Content and Remaining Useful Life of any oil.

FS9V2-RH-DEN Particle Pal: 
Live Particulate, Water %RH and accurate Density sensor to alert to the presence of kerosene, water or any other foreign substance in diesel fuel


  • Incorporates latest laser particle counting technology

  • Real-Time Detection of solid contamination to ISO, SAE and NAS standards

  • Real-Time water %RH measurement
with full temperature compensation

  • Continuous monitoring (inline measurement)

  • Self-contained with integral pump
  • Calibrated against a Karl Fischer titration (ASTM D1533)

  • Integral pump and rechargeable battery 

  • Laptop connectivity for data transfer 

  • Archive creation via Excel


  • Live ISO, NAS and SAE results plus water content %RH
  • Compact, lightweight unit with robust casing

  • Display water content in real time
  • Sample direct from the fuel tank, sample bottle or fuel polishing cabinet
  • Accurately measures the quality of fuel in real time
  • Accurate, repeatable and consistent results
  • The ideal survey tool for field and laboratory use