Aromatics in Solvents Analyzer

The BTX is a real time process analyzer ideal for measuring the presence of aromatics (in parts per million) within hydrocarbon solvents. It uses ultraviolet/visible spectrophotometry for achieving very accurate results.

There is a need to measure the presence of various compounds in the process fluid. An important reason for an accurate analysis is the toxicity of the aromatic molecules. The fully automated instrument is accompanied by a sampling loop, tailored according to the customer’s requirements.

The BTX analyzer provides the required capabilities for the real time measurements of Benzene, Toluene and Xylene (heavy aromatics) in hydrocarbon solvents. The output values are either the concentrations of the single aromatic compounds or their total concentration.



  • Real time, continuous measurement of aromatics in hydrocarbon solvents
  • Fully automated function and operation
  • Fast, accurate results
  • Rugged design
  • Less expensive than a gas chromatograph
  • Minimal maintenance required


Operation Philosophy:

  • The method is analysis is ultraviolet/visible spectrophotometry providing high wavelength resolution
  • The measurement method relies on the Beer-Lambert law. It is relationship between absorption of electromagnetic wave energy to the properties of the material through which the waves are travelling
  • The material (hydrocarbon solvent) is introduced in a sample cell of a specific optical path length. The UV energy is transmitted into the cell via an optical fiber cable.
  • The sensor is made up of an array of photodiodes, each one of them tuned to a specific wavelength. The embedded computer collects the electrical signals from the diode array and calculates the concentration.



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