Definition - What does Manometer mean?
A Manometer is an instrument that measures pressure using a column of liquid. The instrument is used to measure the pressure of fluids and consists of a tube which is filled with a liquid. The level of the liquid is determined by the pressure of the fluid and also by the liquid’s height which is indicated on the scale.
Petropedia explains Manometer
A Manometer is used to measure the pressure difference. The pressure difference is measured by balancing the weights of the liquid’s column between two pressures. Mercury is a heavy fluid used in the Manometer to measure large pressure differences. A lighter fluid such as water is used to measure small pressure differences in venturi flowmeters or experimental wind tunnels. The common problems experienced while measuring the pressure differences in systems with low velocity are satisfying accurately and low column heights.
One of the most commonly used type of Manometers is the water filled manometer with a U-shaped tube; it is used to measure the pressure differences in orifices and pitot that are located in ventilation or air handling systems.