Inclined-tube Manometer
Inclined-tube Manometer - Related Videos
01:25
Inclination of a Line
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2025
The inclination of a line describes its angle of tilt with respect to the horizontal axis. While a line itself is an abstract object with no thickness, its orientation on the Cartesian plane is determined by its slope, which reflects how steeply it rises or falls. The inclination angle, always measured counterclockwise from the positive x-axis, varies between zero and π radians for nonhorizontal lines. This angle directly relates to the slope, providing a geometric interpretation of the line's...
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Jet Impinging on an Inclined Plate
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The goal of this experiment is to demonstrate how a fluid flow exerts forces on structures by conversion of dynamic pressure into static pressure. To this end, we will make a plane jet impinge on a flat plate and will measure the resulting pressure distribution along the plate. The resultant force will be estimated by integrating the product between the...
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Work Done Over an Inclined Plane
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2023
The center-of-mass framework helps to easily describe the work done on rigid bodies. Since the internal forces in a rigid body do no work, they can be ignored, and the external forces can be considered in the work-energy theorem. The work done by gravity to move a rigid body, or the work done by an opposing force to move a rigid body against gravity, can be calculated using the center-of-mass framework. It is the line integral of the force of gravity over the path, considered positive if...
08:12
Pressure Transducer: Calibration Using a Pitot-static Tube
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Source: Shreyas Narsipur, Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC Fluid pressure is an important flow characteristic that is required to determine the aerodynamics of a system. One of the oldest and still existing pressure measurement systems is the manometer due to its accuracy and simplicity of operation. The manometer is generally a U-shaped glass tube that is partially filled with liquid, as shown in Figure 1. The U-tube manometer requires no...
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Moments of Inertia for an Area about Inclined Axes
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2025
In physics and engineering, understanding the moments of inertia for a given area with asymmetrical mass distribution is critical for proper design and analysis. When considering an arbitrary coordinate system, the moments of inertia can be obtained by integrating the moment of inertia for an infinitesimal area element. Suppose another coordinate system inclined at an angle is considered. In that case, the transformation relations can be used to express the moments and product of inertia...
FAQs
The liquid moves along the sloped tube when a pressure difference is applied, then stops when the resulting hydrostatic head balances that pressure difference. The final position therefore represents the pressure difference between the connected sides. This equilibrium provides a direct measurement rather than relying on an electronically calculated or indirectly inferred value.
A small vertical pressure-related head produces a longer displacement along a sloped tube than it would in a vertical arrangement. The extended scale spreads that movement over a greater reading distance, improving sensitivity and resolution. This feature makes the instrument particularly useful when pressure differences are small and ordinary column movement would be difficult to distinguish.
Resolution depends chiefly on how far the manometric liquid travels along the incline and how clearly that displacement can be read on the extended scale. The instrument is therefore best suited to low differential pressures, where the elongated movement provides a measurable indication. Its usefulness decreases when the pressure difference produces movement outside the practical reading range.
It provides a direct, liquid-column indication of differential pressure through hydrostatic balance, rather than requiring a more complex sensing or calculation arrangement. Its simple construction supports straightforward operation and calibration work. However, its main engineering role is the measurement of low pressure differences, not the broad measurement of every pressure condition.
Connect the relevant gas or fluid pressure points to the two sides of the instrument, apply the pressure condition being examined, and allow the manometric liquid to move until it reaches equilibrium. Read the liquid position against the extended scale, then use that displacement as the indication of the pressure difference for the test.
Engineers use it when they need to examine low differential pressures in systems such as ventilation equipment, laboratory apparatus, flow experiments, or process equipment. The reading can help evaluate pressure losses across components and provide a practical check on system behavior. Its direct operation is also useful when a simple, sensitive measurement is preferred.
Because the liquid position responds directly to the pressure difference, an inclined-tube manometer can serve as a reference during instrument calibration. In flow experiments or equipment assessments, comparing readings across a component helps reveal its pressure loss. The same measurement principle links the observed liquid displacement to the pressure condition being studied.
Its simple construction, direct reading method, and enhanced sensitivity suit controlled laboratory measurements of small pressure differences. Students and engineers can use it with laboratory apparatus or flow experiments to observe pressure behavior and compare conditions. The resulting readings also support evaluation of pressure losses and checking the performance of other measurement instruments.