Compliant with standards:

★GB/T 32208-2015<Chemical Oxygen Demand(COD)Meter>

JJG975-2002<Chemical Oxygen Demand（COD）Measuring instrument>

Product Overview:

Heating the sample triggers an oxidation-reduction reaction between organic matter in the water sample and a known amount of potassium permanganate added beforehand,HC211Coulombic titration methodCODThe measuring instrument measures the amount of residual potassium permanganate through electrical titration. When starting to measure the heated sample,In the reagentFe⁺³Ions are reduced by electrolysis toFe⁺²Ions.Fe⁺²Ions rapidly consume excessive potassium permanganate. When the excess potassium permanganate is completely consumedFe⁺²Ions rapidly increase and are detected by the electrode upon titration to reach the endpoint. By measuring the amount of electricity (current) consumed until the endpoint of titration×Time), measure the excess amount of potassium permanganate, and calculate itmg/LDisplay as a unitCODValue.

Product Usage

Widely used for the determination of chemical oxygen demand in different fields such as surface water, groundwater, tap water, and drinking water.

Technical Specifications:

★l Measurement method: Acid potassium permanganate coulometric titration method

l Measurement range:0.5-40 mg/L

l Measurement gear:0.5-10mg/L、 seven point five-20mg/L、 fifteen-40mg/L

★l Accuracy:≤7.5mg/L±0.5 mg/L；＞7.5mg/L≤10%

l Repeatability:0.5-7.5mg/L≤4%；7.5-25mg/L≤10%

l Measurement accuracy:0.1 mg/L

l Measurement time: ≤5minute

l Output device:LCDLCD screen, built-in printer

l Detection limit: 1mg/L

l Minimum reading:0.001mg/L

l electricity Source:AC220V

l merit Rate: ≤45W

l heavy Quantity: ≤3Kg

Instrument features:

★l Visualization of reaction process:The measurement process is clear and the endpoint is intuitive. During the measurement process, numerous parameters such as timing, potential, blank, and time signal diagrams can be clearly seen;

l Reminder function: oxidation decomposition process, potential stability, and buzzer notification function when reaching the endpoint;

★l Data storage and output: automatic data storage, built-in printer, can print data at any time, convenient and fast;

l Coulombic titration is used: the endpoint relies on electrode detection and is not affected by sample color and particulate matter;

l Simple and time-saving operation: digestion only requires5Minute, fully automatic titration;

l Easy instrument assembly: modular design,Disassembly and assembly are safe, simple, convenient, and reliable;

★l Low testing cost: matchingA、BReagents can be directly used for digestion testing, reducing the workload of operators; Less reagent usage saves detection costs;