U Tube Manometer

U-Tube Manometers are versatile, economical instruments for the measurement of pressure, vacuums or differential pressures. Pressure measurements are accomplished by balancing a vertical head of indicating fluid with the pressure to be measured. As there are no cams, gears or levers to operate in the manometer, the readings obtained are always accurate.The U Tube Manometer, have “U” shaped tube, half filled with liquid (Water Mercury SP Gr. 0.81). When both the tubes are open, the liquid is at the same height in each leg (Tube Limbs). When positive pressure is applied to one leg which is the sum of the reading above and below zero, tells you the pressure. When vacuum is applied to one leg, the liquid rises in that leg and falls in the other. The difference in the height indicates the amount of vacuum.