An inclined manometer is a slightly curved tube with a liquid inside, typically a form of oil mixture. Along the tube's middle portion are graduations. The graduations are commonly hundredths of an inch, depending on the manometer's manufacturer.
Inverted U-tube manometer is used for measuring pressure differences in liquids. The space above the liquid in the manometer is filled with air which can be admitted or expelled through the tap on the top, in order to adjust the level of the liquid in the manometer.
The PCE PFM2 micro manometer with Pitot tube is used to accurately determine differential pressure as well as both air flow and gas velocity. The PCE PFM2 micro manometer with Pitot tube is a suitable device to determine high flow velocities.
Pressure measuring devices using liquid columns in vertical or inclined tubes are called manometers. One of the most common is the water filled u-tube manometer used to measure pressure difference in pitot or orifices located in the airflow in air handling or ventilation system.