Turbidity (clarity) of water can be measured with a WAV monitor of a Nephelometer.
WAV monitors use a turbidity tube that allows an estimate of water quality based on a visual assessment of the amount of light that is scattered and absorbed in the water sample. This method is useful during and immediately after rain storms.
When measuring turbidity in the laboratory, a meter called a Nephelometer is used. It measures the amount of light scattered by the particles in the water in Nephelometric Turbidity Units (NTUs).
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