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Oxygen saturation facts for kids

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Taking Water Samples from the Fish Farm
Measuring the dissolved oxygen through a multi-parameter photometer

Oxygen saturation or dissolved oxygen (DO) is a relative measure of the amount of oxygen that is dissolved in a given medium. It can be measured with a dissolved oxygen probe such as an oxygen sensor, or it can be measured with an optode in liquid media, usually water.

The standard unit is milligrams per litre (mg/l) or parts per million (ppm). Fish, invertebrates, plants, and aerobic bacteria all require oxygen (dissolved in water) for respiration. In medicine, oxygen saturation refers to oxygenation. This means when oxygen molecules (O2) enter the tissues of the body.

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