Manometers are simple devices used to measure fluid pressure by comparing it to a reference pressure, often atmospheric pressure. There are two common types: U-tube manometers and inclined tube manometers. U-tube Manometer U-tube manometers consist of a U-shaped tube filled with liquid. Pressure is applied to one side, and the difference in liquid levels indicates the pressure. They are widely used for their simplicity and accuracy. Inclined Tube Manometer Inclined tube manometers have a tube inclined at an angle, improving sensitivity and resolution. Like U-tube manometers, they measure pressure by comparing liquid levels in the tube when pressure is applied.