OilSys_hc – oil in water

In-Situ fluorometer for Oil in water Detection

OilSys_hc is from a new generation of highly sensitive submersible sensors for oil in water measurement. The UV fluorescence principle, used for detection, is much more sensitive than any other existing detection principle, like infrared scattering, etc. This allows the detection of very low levels of PAH (single ppb levels) for use in drinking water or condensate applications.

Typical applications are discharge monitoring of airports and factories, leakage detection and many others. The sensors can be used either in stationary or portable applications. A new innovative coating on the lenses helps prevent the optics from fouling. This together with the air cleaning option makes the enviroFlu HC very robust and deployable for long periods of time.

oil in water analysis


Features and Benefits:

  • miniaturised design
  • RS232 interface
  • 0-5VDC interface
  • 0/4-20mA interface
  • high sensitivity
  • low power consumption
  • low cost
  • fast acquisition
  • RS232 auto power down during non-use
  • anti-fouling nano-coating
  • air cleaning option
  • low maintenance costs
  • no need for frequent calibrations
  • detects many hydrocarbons



  • drinking water
  • wastewater
  • airport monitoring
  • cooling water
  • desalination
  • refineries
  • pipeline leakage detection
  • bilge water monitoring



Light source: miniature Xenon-flash lamp with interference filter (peak wavelength 254nm, 25nm FWHM). Output energy controlled by internal reference diode

Detector: UV photodiode with interference filter (peak wavelength 360nm, 50nm FWHM)

Ranges: (calibrated to Phenanthren solution)

  • enviroFlu-HC 500: 0..50ppb and 0..500ppb
  • enviroFlu-HC 5000: 0..500ppb and 0..5000ppb auto ranging (only with RS232) or pre-set

Detection limits: 0.1ppb (in pure water)
Values can be transformed to total-oil concentrations giving typical detection ranges of up to 200ppm total oil

  • RS232
  • 0..5VDC
  • 4..20mA

Voltage: 9..36VDC
Housing: seawater resistant plastic and stainless steel (1.4571) or titanium
weight: approx. 1.8kg in air (stainless steel version)
size: 68 x 280mm (without connector)
Operation temperature: 0 - 40°C
Depth rating: 300m
(deep-sea version: 6000m)

Download a brochure Quote for OilSys HC