Application
The sensor is used for color measurement in the low range (0...2.5 AU).
• Color measurement
APHA/Hazen, potassium permanganate in water
• Color measurement
– quality testing/purity monitoring
– color reagent dosing
– decolorization control
– distillation monitoring
Advantages
• Detects minute color changes to ensure product quality
– maximum measuring range of 2.5 AU or 50 OD (depending on the optical path length)
– can be set for color measurement (at discrete wavelengths in the visible range)
– superior filter performance with the highest linearity
– high agreement with laboratory values
– built-in reference detector for compensating particles, bubbles and light source aging
– uses an incandescent light source with long service life and stable measured values
• Cost-effective verification (dry)
• FM and ATEX certified light source for use in hazardous areas
• Various window and seal materials available for measurement in various process media
• Air purge function available to prevent condensation on the optical window

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Source:Endress+Hauserpublic information from the website