What instrumentation is typically used to measure the pH of wastewater?

The pH meter is the instrument specifically designed for measuring the acidity or alkalinity of a solution, expressed as pH. It operates by using a probe that detects the hydrogen ion concentration in the wastewater, providing a direct and accurate measurement of its pH level. This is crucial in wastewater treatment processes because pH can significantly impact the effectiveness of chemical treatments and the overall health of aquatic life in receiving waters.

In contrast, other instruments like colorimeters and spectrophotometers are primarily used for assessing specific chemical concentrations based on color changes or light absorption, rather than directly measuring pH. Similarly, a conductivity meter measures the ability of a solution to conduct electricity, which can indirectly relate to ion concentration but does not provide pH values directly. Therefore, the pH meter stands out as the suitable and precise tool for this specific purpose.