• Green Enviro International Pvt Ltd
ISO 9001 : 2015     ISO 14001 : 2015     ISO 45001 : 2018    
Lab COD Analyzer

COD (Chemical Oxygen Demand) is a term used to measure the quality of water. It is a measure of water pollution resulting from organic matter. This parameter is defined asthe amount of oxygen (in milligrams per liter of sample) required. forthe oxidation of all organic matter contained in a water sample. COD limits are set by competent authorities for various effluents permissible for accepting them in Effluent Treatment Plants or for releasing them to the environment. Among the various methods and instruments available. a non-dispersive absorption based instrument has been found to be the best for this.


COD Analyzer is a microprocessor-based instrument for the determination of COD in the range of 50-2000 mg/L in water sample. The analysis involves the measurement of absorbance of the digested sample using the COD Analyzer and relating it to the COD of the sample. The digestion of the sample water involves the water sample being treated with Mercuric Sulphate to remove the interference of chloride ions and subsequently mixing it with an appropriate amount of oxidizer mixture viz. Potassium Dichromate, Silver Sulphate catalyst and Sulphuric Acid and digesting the mixture in a closed vial at 1500 Cfor 2 hours.

  • Rugged, portable design with no moving parts
  • Computer and printer interface
  • On board memory. stores up to 1000 test results along with time and date


  • Principle: Absorption method
  • Oxidiser & Complexing Agent: Potassium Dichromate, Mercury Sulphate in acidic medium.
  • Measuring Range: 50-2000 mg/L without dilution.
    Range extended up to 200,000 mg/L with 5, 20 or 100 times dilution
  • Resolution: 1 mg/L
  • Accuracy: ± 10% of reading, also depends on accuracy of standards.
  • Display: 16 x 2 LCD
  • Reproducibility: +/-10% of reading.
  • Sample Volume: 1 mL
  • Battery: Lithium-Ion rechargeable battery
  • Dimensions: L=240mm, B=125mm, D=110mm.
  • Weight: 2.3 kg
  • Storage: Can store up to 1000 test results with date & time
  • Interface: Serial interface to the Computer or printer for data transfer
  • Data Transfer: Data can be downloaded to the printer or on the computer through USB port

COD Digester

  • Heater Block Dimensions: L=350mm, W=290mm, D=220mm
  • Display: LED Based Digital Display
  • Power Consumption: 250 W
  • Temperature Range: Room Temperature to 150°C
  • Temperature Accuracy: ±1°C
  • Temperature Controller: PID
  • Tube Cavity: Dia=17mm, Depth=40mm
  • Number of Cavities: 25 Cavities to Accommodate 25 Glass Tubes
  • Glass Tube Size: Outer Diameter=16mm, Length=75mm
  • Timer: The timer initiates as soon as the temperature is achieved. When the set time period is over the heaters get switched off automatically and give the alarm.
  • Buzzer: Alarm for cycle end
  • Power Supply: 230V AC, 50/60Hz
  • Weight: 12.5 kg