What does a differential pressure (DP) sensor measure?

A differential pressure (DP) sensor is specifically designed to measure the difference in pressure between two points in a system. It is commonly utilized in various applications, such as flow measurement, where it calculates the flow rate of fluids by measuring the pressure drop across a restriction in the flow path, like an orifice plate or venturi. This principle is based on the fact that the flow rate is directly related to the pressure drop: greater flow produces a larger difference in pressure.

In contrast, pH levels are typically measured using specialized electrodes that respond to the acidity or alkalinity of a solution. Temperature is measured using thermocouples or thermistors, which detect changes in thermal energy. Chlorine residual is commonly determined through specific testing methods that involve colorimetry or titration. Each of these parameters requires distinct sensors or measurement instruments that are designed for their individual properties rather than utilizing a differential pressure sensor. Therefore, the capability of a DP sensor aligns directly with flow measurement, making it the appropriate choice in this context.