👉 A gauge fluid, also known as a flow meter or differential pressure (DP) meter, is a device used to measure the flow rate of liquids and gases in various industrial applications. It operates on the principle of measuring the pressure drop across an obstruction within a piping system, which correlates to the fluid's velocity and, consequently, its flow rate. Gauge fluids are typically measured using a differential pressure transmitter that detects the pressure difference between two points in the system, such as upstream and downstream of the measuring device. The flow rate is then calculated based on the pressure drop and the characteristics of the gauge fluid, such as its density and viscosity. Common gauge fluids include water, oil, steam, and various chemical solutions, each requiring specific measurement techniques to ensure accurate readings.
