With the years of experiences on process analysis and environmental monitoring instrument development, the Focused Photonics Inc has developed the COD-2000 series chemical oxygen demand online analyzer, which is a new generation in the world. The instrument is designed for automatic COD monitoring on several types of water matrix, such as industrial wastewater, municipal wastewater, industrial process water, etc. Such analyzer adopts advanced sequential injection platform, combining with national standard detection method, which ensures reliable and accurate results. With high level of robustness in the electronics, mechanics and hydraulics components. The analyzer provides multiple standard interfaces, which are easy to combine other available instruments, such as flowmeter, pH meter, etc, therefore remote monitoring can be achieved.
The analyzer can be equipped selectively with corresponding pretreatment system for thoroughly meeting the demands of various working conditions and various customers.
Automatic calibration, automatic zero adjustment and automatic cleaning;
High reliability, low maintenance;
Accurate measurement, wide applicable scope;
Safe operation, efficient analysis.
Based on the standard potassium dichromate oxidation method and new technical platform, samples will be digested under the strong oxidant (potassium dichromate), catalyst (silver sulfate) and high temperature (165℃). During digestion, the hexavalent chromium will be reduced to trivalent chromium and the solution’s color will change. The digested solution will be measured with a colorimeter and the absorbance is proportional to the COD concentration.
|Measuring Principal||Colorimetric, high temperature digestion of potassium dichromate||Function||Automatic clean in every analysis period; can remotely control the zero adjustment; surplus reagent alarm and fault protection function.|
|Technology Principal||Sequential injection analysis||Instrument Adjustment||Continuous/periodic/timed/external signal triggered measurement|
|Detection Instrument||Photometer||Adjustment Period||Automatic adjustment interval, may manually select.|
|Measuring Range||(0-100) mg/L;(0-200) mg/L;(0-500) mg/L; 0-1000mg/L;0-5000mg/L||Clean Time||Selectable according to actual situation|
|Potassium Hydrogen Phthalate Test||5%||Digestion Time||Selectable according to actual situation|
|Repeatability||≤3%||Data Storage||One year|
|Resolution||<1mg/L||Maintain period||One month|
|Zero Point Drift||≤±5mg/L||Measuring Period||Normally 30min|
|Range Drift||±5%||Input||2 paths of 4-20mA input, 2 paths switch input, can add analog collection units according to actual situation.|
|Digital Communication||RS232/RS485||Output||2 paths of 4-20mA output; RS-485/234|
|power consumption||<100W||MTBF||≥720h every time|
|Power Supply||(220±22)VAC;(50±2.5)Hz||Reagent||Offer reagent and its formula for per month’s analysis according to actual situation.|
Pollution source monitoring
Industrial water monitoring
Municipal wastewater monitoring