Neminath Instruments

Hazen Scale Color Comparator ASTM D1209

Hazen Scale Color Comparator (ASTM D1209) measures the color of clear liquids like petroleum products using the platinum-cobalt scale for accurate color comparison.

Compliance Standard : ASTM D1209 – Standard Test Method for Color of Clear Liquids (Platinum–Cobalt Scale), APHA Standard Methods, ISO 6271 / DIN 53409 (equivalent reference methods)
Application : The Hazen (APHA / Platinum–Cobalt) Color Comparator is used for visual determination of color in clear liquids such as water, solvents, chemicals, petroleum products, pharmaceutical solutions, resins, alcohols, and wastewater samples. It is widely applied in water treatment plants, environmental laboratories, chemical industries, refineries, and QC laboratories for monitoring product clarity and purity.

Product Description : The Hazen Scale Color Comparator is a precision optical device designed for visual comparison of liquid samples against calibrated APHA color standards. The comparator uses high-quality color glass filters arranged in rotating discs representing standardized Hazen color values. The sample is placed in a viewing tube and visually matched to determine the nearest APHA color number. This simple, rugged, and power-free instrument provides quick, reliable, and repeatable color measurement for routine laboratory analysis.

Technical Specifications

Color Scale	Hazen / APHA (Platinum–Cobalt)
Measurement Range	0 to 500 Hazen Units
Method	Visual comparison
Standards Type	Optical color glass filters
Viewing Mode	Direct visual alignment
Sample Type	Transparent / clear liquids
Operating Mode	Manual
Light Source	Ambient daylight or standard laboratory illumination

Apparatus Supplied

Hazen Color Comparator Body / Housing
Rotating APHA Color Disc Set (0–500 Hazen range)
Sample Viewing Tube / Cell
Protective Storage Case
Instruction Manual

Optional Accessories

Additional or replacement APHA color discs
Spare sample tubes
Standard illumination viewing cabinet
Calibration verification glass set
Cleaning kit for optical components

Dimensions and Weight (Approx.)

Comparator Height	230–260 mm
Base Footprint	120 × 100 mm
Color Disc Diameter	95–100 mm
Sample Tube Length	100–120 mm
Total Weight	~1.2 to 1.8 kg

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