3S Analyzers S.r.l.

Model HC - Oil in Water / Polycyclic Aromatic Hydrocarbons Meter Brochure

The measuring principle is based on fluorescence: when lighted at a specific wavelength (excitation), some chemicals re-emit light (emission) at a longer wavelength.Very few chemicals are fluorescent giving a highly selective measurement.The table below gives the relative intesity of some aromatic hydrocarbons.