Worldwide Inline Process Control Solutions

Aromatics Detection

Typical Applications

  • Monitor wastewater streams for aromatic content (environmental)
  • Monitor refined hydrocarbon streams for benzene content
  • Monitor potable water for aromatic content

At times the leaked medium in condensate and cooling water comes from a group of hydrocarbons called aromatics. Aromatics have a unique property which makes them absorb ultraviolet (UV) light very well, allowing optek to monitor for thier presence to very low ppm levels. The most common aromatic is benzene, but others include toluene, phenol, aniline and xylene. Often, the presence of these aromatics are an undesirable consequence and need to be removed because of health or environmental concerns. Using real-time monitoring for the presence of aromatics in liquid streams allows plants to control product manufacture, increase product quality and ensure environmental compliance.

optek AF46-EX-HT-VB Dual Channel UV Absorption Sensor with Calibration Adapter

UV- Absorption Monitoring

optek has two UV absorption sensors which can make these measurements. In process streams containing background turbidity, a dual wavelength AF46 is used where one wavelength is used to detect the aromatic and the second wavelength is used to detect background turbidity. By determining the difference in the photocurrent of these two wavelengths, the amount of aromatic can be determined. In clean process streams a single wavelength AF45 is used where the aromatic is detected without the need for background compensation.

Regardless of the particular process conditions, optek has a solution for aromatic hydrocarbon detection by UV absorption.