The OCD Xtra combines multiple light wavelengths with multiple sensor technology, to measure oil accurately in the 0-200 ppm range, even in the blackest of produced water. Multiple oil types are automatically compensated for by sophisticated algorithms. The multi-parameter display shows the sample's oil content, turbidity, pressure and a graphical average of oil readings from the last four hours. The last 7 days’ readings are stored in ROM and can be accessed from the help menu. Full on-screen help is available to guide the operator during set-up and maintenance routines.