KAM Simple Precision
CHA Colorimeter / Haze Analyzer
CHA- small

CHA™ insertable model

In 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.

CLICK HERE for a white paper on Interface Detection in Liquid Pipelines


  • 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
  • Measures color + haze in refined products with an accuracy of ± 1% for color
  • Measures full spectrum of visible color (CIE 1931)


  • Batching
  • Interface detection, including dyed fuels
  • Transmix/regrade reduction
  • Turbidity/haze detection
  • Water treatment quality control
  • Jet fuel quality control
  • Brine detection in LPG transfer from storage caverns
Media: Refined products
Material: Wetted parts–316 stainless steel, sapphire
Power: 12–24 VDC 5 Watts max Communication
Outputs: 4-20 mA (2) reflect values for Haze plus designated color scale
Comm. Interface: RS-485 X,Y, Z values plus all color scales, and individual LED readings
Fluid temp.: -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: 1" or 2" flanged flow through spool (custom 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: 4.6" x 7.1" x 4.4" (117mm x 180mm x 112mm)
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: 1" to 48" (20mm to 1200mm)
Weight: from 20 lbs. (9kg)
Certifications: PTB 04 ATEX 1027 PTB04 ATEX 1027
(Ex II 2 G Ex db IIB T6 Gb)
NEMA4 (IP66 equivalent)

CHA Insertable - Flanged Seal

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

CHA Insertable - MNPT Seal

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

CHA Flow Through

CHA™ FT Flow Through with 1" or 2" spool
(Custom flow through models available)