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OMA Color Analyzer

Article: 00092603

NIR analyzer / process / online / continuous

Application Summary

Analyte: Sample color
Available Scales: ASTM Method D1500, APHA (ASTM D1209), Saybolt (ASTM D156), Rosin, nonstandard scales

Introduction

The color of liquid in a process streams is often observed as an indicator of potential problems with product quality or equipment. Subtle changes in process coloring can signify a variety of issues, including dips in process efficiency, overheating, floating dilution ratios, distillation column malfunction, and equipment failure (e.g. leaky heat exchangers or filter breakdown).

Human judgment on color is subjective and variable. The common photometric detectors is dependent on a single, isolated measurement wavelength ? a method susceptible to distortion from bubbling, contamination, or wavering light levels, as all of these conditions are misrepresented in readings as color changes.

The OMA system continuous measures sample color using full-spectrum visible absorbance spectrophotometry. The photodiode array measures absorbance at every single integer wavelength in the visible range from 340 to 720 nm; the ECLIPSE software uses this rich collateral data to secure the measurement against the typical distorting phenomena.

Specifications

  • Technology: NIR
  • Domain: process
  • Other characteristics: online, continuous

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