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Indian Scientific Instrument

Dissolved Oxygen Meter

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Dissolved Oxygen Meter is perfect for laboratories and field work for quick and easy measurement of dissolved oxygen. This is a very handy device employed to measure the amount of oxygen dissolved in a unit of water. Dissolved oxygen meter may come in various design and shapes.

A few commonly used dissolved oxygen meters are discussed below:

  • Polarographic (Clark Cell Method) Sensor Oxygen Meter: It uses an external voltage source keeping the potential difference between the anode and cathode to less than 0.5 volts.
  • Galvanic Sensor Oxygen Meter: It does not use an external voltage source and the difference between the anode and cathode is greater than 0.5 volts. Such meters are more stable and precise when compared to the Polarographic oxygen meters.
  • Optical Fluorescence Oxygen Meter: These are suitable for long-term measurements in groundwater as it is not sensitive to contaminants or for that matter, ageing.

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