Optek markets inline photometric sensors that measure color (Saybolt, ASTM, Gardner, APHA, etc.) of refined fuels, gas/lubricating oils, and NGL streams; all in real time and all under process conditions. In addition, these sensors can monitor haze (free water/TSS/amines/etc.) in these same streams – independent of or in conjunction with the color measurements – allowing for a more complete stream profile. Principally used at refineries, gas plants, custody transfer points and pipelines, Optek provides reliable and repeatable process measurement systems designed to be installed in almost any hazardous environment.