FLUID CONDITION

MONITORING EQUIPMENT

MEASURE. MONITOR, PREVENT.

Detect moisture, contamination and oil degradation early to prevent equipment failure, reduce

downtime and extend the life of your machinery.

Oil Condition Monitoring Equipment

Monitor Oil Health. Reduce Downtime. Improve Reliability.

Oil condition monitoring plays a vital role in modern predictive maintenance. By monitoring moisture, contamination and fluid condition in real time, maintenance teams can identify developing problems before they lead to equipment failure.

At OilSampling.co.uk, we supply professional oil monitoring equipment for hydraulic systems, gearboxes, transformers, lubrication systems and other critical assets. Whether you need permanently installed online sensors or portable instruments for routine inspections, our range helps you make informed maintenance decisions, extend lubricant life and improve equipment reliability.

Featured Products

Compact Moisture Transmitter

CML4 Particle Counter

Compact Moisture Sensor

Why Monitor Oil?

✔ Reduce downtime

✔ Extend oil life

✔ Prevent failures 

✔ Improve reliability

✔ Predict maintenance 

✔ Lower operating costs

CML4 Particle Counter

The CML4 is a compact and portable contamination monitor that delivers a fast, accurate assessment of contamination in the field and is the perfect solution for the mobile, construction and plant hire sectors.



  • Integrated pump – For testing unpressurised oil samples
  • Simple and intuitive – Easy to master with no need for a laptop.
  • Long-life lithium ion battery
  • High Pressure Sampling – Up to 420 bar / 6091 PSI
  • Memory capacity – Store up to 4000 results
  • Connectivity – Integrated USB C port
  • High-resolution – 7” full-colour touchscreen
  • IP65 rating for enhanced protection
  • Bluetooth-enabled – Optional printer accessory available
  • Various reporting formats included


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EE381 Compact Moisture in Oil Transmitter

EE381 is a compact and rugged moisture in oil transmitter offering an optional display. It is suitable for in-line oil monitoring up to 20 bar pressure or 100 bar if required. High accuracy and long-term stability make it ideal for preventive maintenance of plants and machinery.


The device accurately measures water activity (aw) and temperature (T), and calculates water content (ppm) in the following oils:

  • Transformer oil
  • Lubrication oil
  • Hydraulic oil
  • Engine oil
  • Diesel fuel



Key features


  • Oil temperature up to 120 °C
  • Two analogue outputs; voltage or current.
  • Optional LCD Display
  • Status LEDs
  • Pressure rating 20 bar (std) or optional 100 bar
  • G ½” ISO or ½” NPT process connection
  • Adjustable position of display: 360° rotation
  • Outputs freely configurable by the user using the optional configuration s/w and USB cable


More Info

E+E Elektronik Omniport 40 Moisture in Oil Handheld Meter

Typical Features

  • Measures multiple parameters, including humidity, temperature, dew point (down to –60 °C Td), CO₂, air flow, mass flow, pressure, and moisture in oil.
  • Integrated oil quality database for fast and reliable moisture-in-oil analysis.
  • Connect up to two probes simultaneously with automatic probe detection.
  • Extensive data logging capacity of up to 1 million records, with USB-C interface for quick transfer.
  • Intuitive operation with backlit dot-matrix display, graphical views, and selectable languages.
  • Durable design: IP67 rated, shock and impact resistant, with rechargeable batteries.
  • Convenient extras include a built-in stand, magnetic mount, favourites, and alarm functions.
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Typical Applications

  • Maintenance & Servicing: Quick diagnostics in industrial systems, HVAC, and energy plants.
  • Process Monitoring: Reliable control of environmental and oil parameters in production lines.
  • Oil Quality Management: Ensure consistent lubrication and protect valuable equipment.
  • Field Use: Portable and rugged design ideal for technicians and engineers working on-site.


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