Online Chemical Oxygen Demand Analyzer (COD)

Model No:CODcr-2001

APPLICATIONS:Environmental pollution source monitoring/Industrial process water monitoring/Municipal sewage monitoring/Wastewater treatment plant monitoring

PRINCIPLE:Potassium dichromate oxidation spectrophotometry

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Features of the instrument

  • Advanced sequential injection platform, greatly reduces the number of components, with a simple and easy-to-diagnose structure.
  • High-precision and stable injection pump, non-contact liquid quantitative design, high dilution range with less water consumption and short dilution time.
  • The ten-way valve flow path adopts laser micro-engraving technology to precisely control the size and positioning of the grooves. The valve core is made of sapphire material with ultra-high corrosion and wear resistance, long service life, and good stability.
  • Integrated digestion/colorimetry unit with high absorbance resolution.
  • Liquid reagents do not require low-temperature storage and can be stored at room temperature for more than 30 days.
  • Power-off protection design, no data loss, and automatic recovery of working status when power is restored.
  • Intelligent fault alarm and automatic reset to avoid abnormal rotation of the instrument.
  • Micro reflux digestion technology and innovative automatic direct wind speed cooling device improve digestion and cooling efficiency and shorten sample processing time.
  • Automatic verification and judgment function to meet the requirements of new standards.
  • Customizable development of special functions and services to ensure ease of use and user-friendliness.

Technical parameters

Measurement range 0-200/500/1000/2000/5000/10000/20000mg/L, the range can be customized according to customer requirements.
Accuracy ±5%
Repeatability ≤5%
Quantitative lower limit 15mg/L
Resolution 0.1mg/L
24h low concentration drift ±5mg/L
24h high concentration drift ±5%F.S
Measurement mode point measurement/cycle measurement/external signal trigger measurement
Standard solution verification immediate verification/automatic verification
Instrument calibration automatic calibration/manual calibration, calibration cycle and time can be set
Automatic cleaning cleaning cycle can be set
Digestion time can be chosen according to actual situation
Data storage can store data for 3 years
Output 2 channels of 4-20 mA analog output; RS232/RS485 digital output
Power requirements AC220±10%V,50±10%Hz,10A; power consumption less than 100W
Operating temperature (5~40)℃
Dimensions 700mm(H) x 500mm(W) x 400(D)mm excluding the pretreatment system cabinet
Weight less than 30kg, excluding the pretreatment system cabinet.
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