Thermo Orion AQUAfast AQ3140 COD Colorimeter

The Thermo Orion AQUAfast AQ3140 COD Colorimeter is designed to provide accurate measurements and is ideal for laboratory testing of chemical oxygen demand (COD).


  • Large digital backlit display
  • Angled, ergonomic design for easy bench top or hand-held use
  • 2-year warranty
List Price $854.00
Your Price $811.30
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The Thermo Scientific Orion AQUAfast AQ3140 COD colorimeter is a single-parameter instrument for determining chemical oxygen demand in water. The AQUAfast AQ3140 COD colorimeter and COD reagents measure COD in the range of 0-15000 mg/L through dichromate method that estimates the theoretical oxygen demand, i.e. the amount of oxygen consumed in total chemical oxidation of the organic constituents present in the water.

The colorimeter is designed to give accurate results that are highly reproducible. AQ3140 measures the COD concentration by photometric detection employing a linear relationship between absorbance and concentration. The AQUAfast AQ3140 colorimeter offers a number of features designed to improve user experience, including two LED light sources for long-term stability.

  • (1) AQUAfast AQ3140 COD colorimeter
  • (1) Field carrying case
  • (1) Set of batteries
Questions & Answers
Can this meter be used in the field to determine COD in storm water?
While this is a COD meter that can measure chemical oxygen demand quicker than traditional methods, the samples require digestion using a thermoreactor.
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