Ad
related to: how to do manometer problems
Search results
Results from the WOW.Com Content Network
The experiment uses a simple barometer to measure the pressure of air, filling it with mercury up until 75% of the tube. Any air bubbles in the tube must be removed by inverting several times.
The most common choices for a manometer's fluid are mercury (Hg) and water; water is nontoxic and readily available, while mercury's density allows for a shorter column (and so a smaller manometer) to measure a given pressure. The abbreviation "W.C." or the words "water column" are often printed on gauges and measurements that use water for the ...
A colleague of Calandra posed the barometer question to a student, expecting the correct answer: "the height of the building can be estimated in proportion to the difference between the barometer readings at the bottom and at the top of the building". [19]
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]
Anorectal manometry (ARM) is a medical test used to measure pressures in the anus and rectum and to assess their function. [1] [2] The test is performed by inserting a catheter, that contains a probe embedded with pressure sensors, through the anus and into the rectum. [3]
A flow of air through a venturi meter, showing the columns connected in a U-shape (a manometer) and partially filled with water.The meter is "read" as a differential pressure head in cm or inches of water and is equivalent to the difference in velocity head.
The pressure in this smaller volume is then measured by a mercury manometer, and knowing the compression ratio (the ratio of the initial and final volumes), the pressure of the original vacuum can be determined by applying Boyle's law. This method is fairly accurate for non-condensable gases, such as oxygen and nitrogen.
I do still support, and have tagged, a merge from vacuum gauge to manometer, pressure measurement possibly presented as a type of pressure gauge.--Yannick 17:30, 6 August 2006 (UTC) Very few of the liquid-column manometers I used to design and manufacture were used for vacuum measurement.
Ad
related to: how to do manometer problems