TriOS enviroFlu-HC Oil-in-Water and PAH Sensor

TriOS enviroFlu-HC is an immersion UV fluorescence sensor that measures oil and polycyclic aromatic hydrocarbons (PAH) in water without reagents. A xenon flash lamp with a 254 nm filter excites the sample and a photodiode with a 360 nm filter detects the fluorescence, with a response time (T100) of 10 s or less. The IP68 housing is made of 1.4571/1.4404 stainless steel or titanium (3.7035). Mikron Proses (Üsküdar, Istanbul), TriOS’s solution partner in Turkey, provides application consulting on sensor selection, commissioning and calibration.

Application consulting · Commissioning · Calibration → Send us your requirement

Oil and PAH measurement by UV fluorescence

The enviroFlu-HC is designed for the measurement of oil in water and PAH in the aqueous phase. The measurement needs no sampling, no sample preparation and no reagents, so the sensor can be used in a process line, a shaft, a flow or a FlowCell. A coating on the optical measuring window reduces fouling and keeps the maintenance effort at a typical 0.5 hours per month or less.

Models and measuring ranges

Model	PAH measuring range	Oil measuring range (typical)	PAH detection limit
enviroFlu-HC 500	0-50 µg/L, 0-500 µg/L	0-1.5 mg/L, 0-15 mg/L	0.3 µg/L
enviroFlu-HC 5000	0-500 µg/L, 0-5000 µg/L	0-15 mg/L, 0-150 mg/L	0.5 µg/L

The measuring range of each model is fixed at delivery and cannot be changed later. The accuracy of a measured value is ± (5 % + detection limit).

Applications

• Drinking water and desalination: detection of hydrocarbon contamination in water.
• Condensate and cooling water: leak detection in cooling water, condensate and wastewater streams.
• Refineries and petrochemicals: monitoring of oil and PAH in process water and discharge.
• Marine use and scrubber monitoring: the enviroFlu-HC is designed, in line with IMO resolutions MEPC.259(68) and MEPC.340(77), for monitoring PAH in the discharge water of exhaust gas cleaning systems, and is also used for bilge water monitoring.

For the complete ship-board measurement cabinet, see the TriOS EGC Water Analyzer. The principle behind oil and PAH sensors is explained in the oil-in-water measurement guide, and the sensor can be connected to the TriOS TriBox controllers.