Q. What is the difference between manometer and piezometer?

Answer

While a manometer is utilized to measure gas pressure, a piezometer is employed to do the same for liquids. Manometers, which contain mercury and oil, are used to gauge gas pressure, whereas peizometers, which contain mercury and water, are used to gauge liquid height. The piezometer detects the depth of groundwater in the wells, while the manometer gauges the pressure of the gas inside the clear U-tube. A piezoelectric glass tube just requires water. Mercury, a manometric liquid, is typically employed in manometers. While a gauge detects the difference in pressure between two fluids, a manometer monitors the pressure within a fluid, in this case a double liquid column.