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DO (Dissolved Oxygen)

DO or Dissolved Oxygen, is a vital parameter that measures the amount of gaseous oxygen dissolved in water, typically expressed in mg/L or ppm. DO levels are critical for aquatic life; adequate concentrations (generally above 5 mg/L for freshwater) are necessary to sustain the survival of fish and other aquatic organisms. Fluctuations in DO can be a direct indicator of organic pollution, where the decomposition of organic matter by bacteria consumes the dissolved oxygen. In industrial applications, monitoring DO in boiler feedwater is crucial as dissolved oxygen can cause severe corrosion to piping and systems. Therefore, accurate DO measurement is essential for environmental management and industrial process control.