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Mercury is a useful material to use in a manometer because of its high density. This means that a much shorter column is needed compared to water. [2] For instance, the pressure represented by a column of 100 mm of water is just under 7.4 mm of mercury . [3]
It consists of a submerged manometer and container holding the substance whose vapor pressure is being measured. The open end of the manometer is then connected to a pressure measuring device. A vacuum pump is used to adjust the pressure of the system and purify the sample. Various ASTM vapor pressure measurement standards use the isoteniscope.
Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers and manometers, among other names. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area.
It is a marker of respiratory muscle function and strength, [4] represented by cmH 2 O and measured with a manometer. MIP is an important and noninvasive index of diaphragm strength and an independent tool for diagnosing many illnesses. [5] Typical MIPs in adult males can be estimated from the equation M IP = 142 - (1.03 x Age) cmH 2 O, where ...
A flow of air through a pitot tube Venturi meter, showing the columns connected in a manometer and partially filled with water. The meter is "read" as a differential pressure head in cm or inches of water. Video of a Venturi meter used in a lab experiment Idealized flow in a Venturi tube
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A glass McLeod gauge, drained of mercury. A McLeod gauge is a scientific instrument used to measure very low pressures, down to 10 −6 Torr (0.133 mPa).It was invented in 1874 by Herbert McLeod (1841–1923). [1]
Types of pitot tubes A pitot-static tube connected to a manometer Pitot tube on Kamov Ka-26 helicopter A Formula One car during testing with frames holding many pitot tubes Location of pitot tubes on a Boeing 777. A pitot tube (/ ˈ p iː t oʊ / PEE-toh; also pitot probe) measures fluid flow velocity.
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