U Tube Manometer

A U-tube manometer is a U-shaped glass tube filled with a liquid (water or mercury) used to measure gauge pressure by comparing pressure differences. One end connects to a pressurized system, causing liquid displacement () proportional to the pressure, while the other end remains open to the atmosphere. Key Aspects of U-Tube Manometers Working Principle: Pressure applied to one side forces the liquid down in that limb and up in the other; the difference in height () indicates pressure. Components: A transparent U-shaped tube, a measuring scale, and a manometer fluid (like mercury or water). Types: Simple U-tube: Both ends open or one connected to pressure. Well-type: One leg is a wide well, reducing the need to read both sides. Inclined-tube: Used for low-pressure measurements to improve precision. Common Applications HVAC Systems: Used to measure static pressure and detect airflow restrictions or filter blockages. Industrial Labs: Calibrating pressure recorders and measuring gas valve pressure. Water Systems: Testing home water line pressure.