Name a common instrument used for measuring turbidity in water.

A turbidity meter is specifically designed to measure the clarity of water by assessing how much light is scattered by suspended particles in the water sample. This is crucial in various applications, including water treatment and environmental monitoring, as turbidity can indicate the presence of pollutants or particulates that may affect water quality.

In contrast, a pH meter measures the acidity or alkalinity of a solution but does not provide information about turbidity. A conductivity sensor determines the conductivity of water, which relates to the concentration of ions but is not a direct measure of clarity. A temperature probe measures the temperature of the water, which, while important for water quality, does not relate to turbidity levels. Thus, the turbidity meter's specific function makes it the correct instrument for this measurement.