COD Analyzer and Control System

The COD Analyzer and Control System measures the Chemical Oxygen Demand (COD) in any water or wastewater process. Given the huge numbers of organic compounds in water, it is practically impossible to identify and measure each one individually. Instead of analyzing individual substances, a fast and precise way to rate water quality is to measure sum parameters – this is especially helpful in the case of online monitoring.

The COD Analyzer and Control System is a continuous, online controller that is the perfect solution for monitoring the contamination of water or wastewater. RealTech Controls offers the ETX analyzer combined with the UV254 sensor for accurately and reliably determining the equivalent BOD, TOC, or COD in water.

Products

COD Analyzer

Model: ETX + UV254

COD Analyzer

Description

The Model ETX with the UV254 Sensor utilizes state of the art UV 254nm optical absorbance technology to measure organics in water.

Many dissolved organic substances have spectral characteristics capable of absorbing UV light at the wavelength of 254 nm. A UV source produces UV light radiation that passes through the optical path. The receiver analyzes the UV pulses at two different wave lengths, a measurement wavelength (254 nm) and a reference wavelength which is not influenced by the presence of organic compounds. This results in accurate, repeatable measurements which can be read as a scalable mA value.

Abbreviations:
TOC = Total Organic Carbon
COD = Chemical Oxygen Demand
BOD = Biological Oxygen Demand

  • On-line, real time equivalent measurements for TOC, COD, or BOD
  • Configuration for low or high measurement ranges for increased measurement accuracy
  • Low Range Configuration – up to 370 ppm (mg/L)
  • High Range Configuration – up to 1000 ppm (mg/L)
  • Single or dual channel controller versions available
  • Factory tested and calibrated for plug-and-play installation
  • 2 x mA outputs with 3 x set-point relay / alarm outputs
  • Modbus RTU
  • Rugged stainless steel sensor construction
  • Sensor installations options for flow cell, fast loop reservoir, or direct immersion standpipe
  • Advanced sensor wiper design reduces maintenance and calibration periods
  • Industrial wastewater
  • Drinking water
  • Industrial effluents
  • Effluent and influent monitoring
  • Power plants
  • River and surface water
  • Rain over-flow basins
  • Dissolved organics in water