The analyzing unit uses an Oil Content Meter (OCM) , which typically employs light scattering or turbidity measurement techniques to determine oil concentration in parts per million (PPM) .

Here’s a based on the working principle of ODME (Oil Discharge Monitoring Equipment) , as used on oil tankers to comply with MARPOL 73/78 Annex I regulations.

A standard ODME system from providers like Rivertrace or Insatech Marine consists of several specialized units: