Shop a range of Hach products for COD monitoring including COD analyzers, instruments, reagents, and more. Learn what COD is and why it's measured.

Hach TNTplus COD vial test reagents are incredibly simple to use and cut down significantly on waste generation compared to other COD test kits. TNT822 is based on Hach Method 8000 for virtually any type of water sample.

For high range, mercury-free Chemical Oxygen Demand (COD) determinations. COD2 Digestion Vials, Mercury-Free Formulation. Range: 20-1500 mg/L COD. Pack of 150 vials

The results in mg/L COD are defined as the milligrams of O2 consumed per liter of sample under the conditions of this procedure. The sample is heated for 2 hours with sulfuric acid and a strong oxidizing agent, potassium dichromate.

The new generation CODmax III COD online detector uses potassium dichromate method for high temperature digestion. The COD detector uses photometry to measure the sample absorbance, and analyzes and determines the linear relationship between absorbance and COD value of …

Chemical oxygen demand (COD) is the amount of dissolved oxygen that must be present in water to oxidise chemical organic materials, like petroleum. COD is used to gauge the short-term impact wastewater effluents will have on the oxygen levels of receiving waters.

The EZ Series Online Analysers offer multiple options to monitor Chemical Oxygen Demand (COD) in water. Typical applications are wastewater and surface water. The EZ7000 Series COD Analysers are single-parameter titrators. Some applications may require the use of a sampling/filtration or an external dilution system for sample preconditioning.

Hach chemistries are rigorously tested in combination with our packaging and instruments to ensure the highest possible system performance. Our portfolio includes: TNT (Test ‘N Tube) Vials, TNTplus Vials, Permachem Powder Pillows, and Accuvac Ampules.

Expert Mercury free COD test made simple. COD TNTplus ® chemistry and your Hach spectrophotometer are engineered to simplify water analysis for accurate results, everytime. For determination of Chemical Oxygen Demand (COD) by the …

Hach’s USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand method in the world for NPDES reporting and for easy process monitoring.