KAM Simple Precision
CHA Colorimeter / Haze Analyzer

CHA- smallIn refined petroleum products, color variations indicate impurities and/or the presence of trace water or haze. This contamination can be a significant liability as color differentiation can be easily detected by the end user. The CHA Colorimeter/Haze Analyzer is the ideal qualitative solution for monitoring both the color of refined products, including those with added dyes, and the presence of haze or turbidity in pipelines following the refining process. In addition, it can be used as quality control with water treatment.

Utilizing a unique 5-LED design, the CHA detects color variations within 1%, and unlike most colorimeters, it can detect the entire range of visible color as defined by CIE 1931 (International Commission on Illumination). Final color measurement can be expressed as haze plus three color (X, Y, Z) or one of several industry-standard color scales including, Saybolt, Platinum and Cobalt, and ASTM.

Turbidity or haze measurement allows refineries and pipeline operators to identify and redirect non-conforming batches.

Measurement is fully automatic, and the CHA Colorimeter/Haze Analyzer  does not require site calibration. It employs long lasting LED light sources ensuring long-term, stable performance with limited maintenance and power requirements. In addition, locating the electronics within an explosion-proof enclosure directly on the atmospheric end of the optical probe creates a complete and compact unit with maximum installation flexibility. The CHA easily installs where other colorimeters, weighed down by large electronics/computer units, cannot.

A paper on Interface Detection in Liquid Pipelines, including the CHA, was presented at the International School of Hydrocarbon Management in Oklahoma City, Oklahoma.


  • Offers greater accuracy over other, 3-LED models
  • Long-term performance with minimal power and maintenance requirements
  • Automatically adjusts for electronic noise, LED fluctuations, and varying absorption rates


  • Only Colorimeter unit on the market with incorporated electronics
  • Accuracy to ± 1%
  • No moving parts
  • 5-LED Design offers greater accuracy over other, 3-LED models
  • Measures full spectrum of visible color (CIE 1931)


  • Batching
  • Interface
  • Transmix/regrade reduction
  • Turbidity detection
  • Dyed fuel interface detection
  • Water treatment quality control
  • Aviation fuel quality control
  • Refined fuels quality control
  • Brine detection in LPG transfer from storage caverns
Media: Refined products
Material: Wetted parts–316 stainless steel, sapphire
Power: 12–24 VDC 20 Watts max Communication
Interface: RS-485 reflects values for Haze plus designated color scale (see Color Range)
Fluid temperature: -40º to 200ºF (-40º to 93ºC)
Electronics temp: -22º to 185ºF (-30º to 85ºC)
Pressure ratings: ANSI 150, 300, 600
Accuracy: Haze ± 5%, Color ± 1%
Repeatability: Haze ± 1%, Color ± 1%
Reproducibility: Haze ± 1%, Color ± 1%
Haze Range: 0-100%
Color Range: Complete range of: CIE 1931 three color (X, Y, Z); ASTM D 1500; ASTM D 156 (Saybolt); ASTM D 1209 (APHA Platinum-Cobalt)
Mounting: ¾", 1", 1½", and 2" FNPT Flow Through (Metric sizes available) 2" MNPT Seal Housing 2", 3", or 4" Flanged Seal Housing
Sensor Dimensions: 3.5" x 1.25"Ø (90mm x 32mm) Flow through 5.8" x 2.75"Ø (148mm x 70mm)
EX enclosure: 3" x 6" x 3" (76mm x 152mm x 76mm)
Shaft length: 12" to 60" (305mm to 1524mm) Off-the-shelf lengths 12", 24", 36", 48" and 60" (305mm, 610mm, 915mm, 1219mm, 1524mm)
Pipe size: ¾" to 48" (20mm to 1200mm)
Weight: from 20 lbs. (9kg)
Certifications: PTB 04 ATEX 1027 ATEX_Symbol II 2 G  EEx d IIB T6

CHA Insertable - Flanged Seal

Insertable CHA™ on a main pipe, with 2", 3", or 4" flanged seal housing.

CHA Insertable - MNPT Seal

Insertable CHA™ on a main pipe, with 2" MNPT seal housing

KAM CHA Flow Through

CHA™ FT Flow Through with 1" flanges