Oil Detectors – Water

Autonomous non-contact sensor for detection of oil on water and land. Highly accurate, easy to maintain, finds oil spills and leaks early so you can respond faster.


Water treatment plants rely on clean surface water entering the plant. An oil spill could threaten the entire treatment plant for an extended period. In this case it is crucial to detect the presence of oil early and prevent it reaching the inlet and filters. LDIs ROW oil on water detector ensures rapid and safe detection and allows suitable shut off at the inlet. The sensors are optical and non-contact which reduces the risk of sensor fouling and maintenance. Changes in water level (e.g. from a river) are not an issue for the sensor.

With the ROW’s optical technology for non-contact monitoring, there is no marine biofouling or oil contaminating the sensor. This limits the need for regular cleaning.

Row Detects

  • Motor oils
  • Turbine oils
  • Vegetable oils
  • Fuel oils
  • Marine diesel oils
  • Crude oils
  • Heating oils
  • Lube oils
  • Hydraulic oils
  • Gas oils
  • Motor oils
  • Mineral oils

24/7 Operation Even in Harsh Environments
Available in anodised aluminium, 316 stainless steel and EXd enclosures for even the toughest applications.

Long Life, Low Maintenance
Robust IP68 certified hermetic design and 5 year LED lifetime. Low power consumption of < 2W with optional remote operation using solar panels battery.

Non-Contact Detection Instrument
Easier installation, no water contamination and no maintenance.

Drinking Water application (River)

Rainwater Collector

Drinking Water Intake

Manufacturing Discharge

The Science

To detect oil slicks as thin as a single micron from up to 10m above the water, the ROW pulses a UV beam at the surface and excites any oil molecules in the target area. Using oil’s native fluorescence, ROW is calibrated to identify the specific wavelength signal of oil and send out an alert.

After 20 years of developing remote-sensing systems, LDI has mastered the technology better than anyone else.

Industry leading Sensitivity – 1µm

Advanced software algorithms are calibrated to detect oil down to single-micron layers and minimise false alarms.


Service and Maintenance

Two versions available.

Light Fraction Standard Configuration
Model O-4500B O-2301B
Oils detected Light to Medium fractions Medium to heavy fractions
Kerosene, gasoline, jet fuel, diesel etc Crude, bunker fuel, fuel oils, diesel
Range 2m 8m