:: Product Information

COD-OnlineAnalyser automatic analysis of chemical oxygen demand

bbe

CODmn-PWRII is a high performance automatically CODMn(permanganate Index)analyzer which was developed by the German company bbe GmbH,the device consists of the sampling unit, digester unit, measure unit, operate and display unit. The device with reasonable design of the construction, working stable and reliable, easier maintenance which can can accuracy detect the permanganate Index of the surface water, drinking water and sea water.


Features & Informations


Advantages

High accuracy spectrophotometer detection unit which fully guarantee the stable and accuracy of the end point determinate.

Highly stable peristaltic pump keep precise metering of the water sample and reagent, and each reagent sampling by independent peristaltic pump to avoid the cross contamination among the reagents.

High performance digest unit make sample effective digest which improve the accuracy of the measurement.

Instrument’s construction simple, easier installation, working stable and reliable, easier maintenance.

Programmable control unit can achieve automatically analysis.

Touch panel display, all operation can done by the touch panel which support Chinese and English.


Applications

COD-OnlineAnalyser is a high performance automatically CODMn (ermanganate Index)analyser. The device consists of the sampling unit, digester unit, measure unit, operate and display unit. The device with reasonable design of the construction, working stable and reliable, easier maintenance which can can accuracy detect the permanganate Index of


the surface water

drinking water

and sea water


Measure principle

Sampling by the peristaltic pump to the digester, then add Potassium Permanganate and the sulfuric acid which heating to100℃ for high temperature digest 30 min. The organic substance in the sample will be oxidized by the Potassium permanganate .Add overdose Sodium oxalate to deoxidize the rest Potassium permanganate after the reaction, then use the Potassium permanganate standard solution to titrate the overdose Sodium oxalate. Photometric measurement by the colorimeter to determinate the end point of the titration, then the PLC will automatically calculate the COD concentration according to the working curve of absorbance value combined with the standard sample.


DESCRIPTIONVALUE
Measurement principlePhotometric
Range0 - 8/20/60mg/L
Accuracy< ±5%
Repeatability< 5% RSD
Detection limit0.4mg/L
Span drift< 3% FS/24h
Zero drift< 3% FS/24h
Measure time60 min.
Measure period2, 3, 4, ...h/once or continuous measurement
Resolution0.01mg/L
Sampling methodsampling by peristaltic pump
Signal output2 channel analog 4-20mA
InterfaceRS232/485 MODBUS/TCP
Working environmentTemperature: 5~35°C; Humidity: <85%
Power supply220±10%V 50±1%HZ
Power consumptionabout 300W
Weight and sizeWeight: ~50Kg; Size HxLxW: 160x58x38cm
Protection levelIP54; IP65
Sample conditionNo oil, no supended solid, temperature: 5~35°C, Pressure: 0~0.1Bar, Flow: 1.5~3L/min


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