Manometer
Manometer - Related Videos
02:57
Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer
0 Views •
2020
Gas pressure is caused by force exerted by gas molecules colliding with the surfaces of objects. Although the force of each collision is very small, any surface of an appreciable area experiences a large number of collisions in a short time, which can result in high pressure. In general, pressure is defined as the force exerted on a given area: Pressure is directly proportional to force and inversely proportional to area. Thus, pressure can be increased either by increasing the amount of...
06:48
Assessing Intertidal Populations of the Invasive European Green Crab
0 Views •
Cited by 1 •
2020
Understanding spatiotemporal patterns in green crab population dynamics is essential for predicting and managing the ecological and economic impacts of this harmful invasive species. This protocol was developed in an effort to create a standardized method for assessing green crab populations in the rocky intertidal zone of the Northwest Atlantic.
08:12
Pressure Transducer: Calibration Using a Pitot-static Tube
0 Views •
2023
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...
07:59
Airfoil Behavior: Pressure Distribution over a Clark Y-14 Wing
0 Views •
2023
Source: David Guo, College of Engineering, Technology, and Aeronautics (CETA), Southern New Hampshire University (SNHU), Manchester, New Hampshire An airfoil is a 2-dimensional wing section that represents critical wing performance characteristics. The pressure distribution and lift coefficient are important parameters that characterize the behavior of airfoils. The pressure distribution is directly related to the lift generated by airfoils. A Clark Y-14 airfoil, which is used in this...
03:06
Cellular Respiration - Instructor Prep
0 Views •
2019
Quantifying Respiration using Microrespirometers ExpandTo assemble the microrespirometers needed for the lab, first plug in the hot glue gun to preheat it. Push the plunger of a tuberculin syringe all the way in and then cut the end off of the syringe. Next, insert a capillary tube into the empty needle end of the syringe. Push the capillary tube in until it touches the tip of the plunger. Use the hot glue gun to create an airtight seal between the capillary tube and the tuberculin syringe.
FAQs
Pressure is obtained from the hydrostatic balance between the two liquid columns. When the connected pressure differs from the reference, the columns move in opposite directions; their displacement stops when fluid forces balance. The resulting height difference is interpreted together with the manometer liquid’s density and gravitational acceleration, allowing a pressure difference to be quantified.
The reference side determines what the reading means. Comparing a system with atmospheric pressure produces a gauge-pressure measurement, whereas comparison with another pressure point gives differential pressure. An absolute-pressure arrangement instead uses an absolute reference. Thus, the same column-displacement principle can support different engineering measurements, depending on the pressure selected as the baseline.
The manometer liquid’s density controls how much column displacement corresponds to a pressure difference. For a given pressure difference, a higher-density liquid produces a smaller required height difference, while a lower-density liquid produces a larger one. Gravitational acceleration also enters the conversion, so both fluid properties and the measurement setting must be included when interpreting the columns.
To use a manometer for a pressure comparison, connect the measurement arrangement to the pressure of interest and establish the chosen reference. Allow the liquid columns to reach hydrostatic equilibrium, then measure their vertical height difference. Combine that difference with liquid density and gravitational acceleration to determine the pressure relationship. The result can then be compared with another instrument during calibration.
In pipeline and ventilation work, the useful result is often a pressure difference between locations or between a system and its surroundings. A manometer translates that difference into a visible column displacement, enabling engineers to monitor changing pressure relationships in the system. It therefore provides a direct pressure-comparison measurement for operational monitoring within engineering systems.
Fluid-flow analysis uses manometer readings to quantify pressure relationships within the system being studied. The measured column difference, interpreted using density and gravity, supplies pressure information that can be considered alongside the flow investigation. This is valuable when the engineering question concerns how pressures compare across a system, rather than requiring a measurement of pressure at only one isolated point.
In engineering education, the instrument links observable liquid movement to the governing pressure relationship. Students can vary the pressure comparison, observe the columns settle into equilibrium, and relate the measured height difference to density and gravity. This makes the manometer a practical way to study fluid mechanics, pressure measurement, and the interpretation of gauge, absolute, and differential readings.