Turbidity is the measurement of the cloudiness of a fluid. To measure turbidity using this apparatus, fill the tube with water and drain it slowly by limiting flow with the pinch clamp on the hose. Stop draining once the black and white Secchi disk on the bottom of the tube becomes visible, and then take note of the water level using the graduations on the tube. The length is 60 centimeters. A comprehensive instruction guide in included.
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