how to read a manometer

Note that the scale is in units of millimeters. A manometer is a good example, as it uses the surface area and weight of a column of liquid to both measure and indicate pressure. Use the two heights to determine the pressure of the system.

This article has been viewed 18,726 times. The aneroid manometer is one of three main types of sphygmomanometer; both aneroid manometers and mercury manometers must be read manually and are used pretty much the same … Sign up today for the only virtual event focused on the application of AI to drive business, customer, and process value through a discuss, debate and define format!One of the earliest pressure measuring instruments is still in wide use today because of its inherent accuracy and simplicity of operation. Cookies are only used in the browser to improve user experience. Assuming the liquid in the manometer is water, this is simply the result from step 1 in inches. By using our site, you agree to our Include your email address to get a message when this question is answered.Master's Degree, Nursing, University of North Dakota The manometer in Figure 5 measures the pressure compared to zero absolute pressure in a sealed leg above a mercury column.

The most common form of this manometer is the conventional mercury barometer used to measure atmospheric pressure. Manometry measurements are functions of gravity and the liquid's density, both physical properties that make the U-tube manometer a NIST standard for accuracy.As shown in Figure 1, with each leg of a U-tube manometer exposed to the atmosphere, the height of liquid in the columns is equal. When selecting an indicating fluid, check the specifications for specific gravity, operating temperature range, vapor pressure, and flash point.

The difference height in the water column is The pressure difference head can calculated from (1) asA common problem when measuring the pressure difference in low velocity systems - or systems with low density fluids - like air ventilation systems - are low column heights and accuracy. exclude terms.Register today for Fierce AI Week - a free virtual event | August 10-12Advances in AI and Machine Learning are adding an unprecedented level of intelligence to everything through capabilities such as speech processing and image & facial recognition.

Calculate the pressure in torr, atm, kPa, and psi.

9.8 (kN/m 3) is the specific weight of water in SI-units.

Shari Forschen is a Registered Nurse at Sanford Health in North Dakota. If your elevation is substantially higher or lower than sea level, get a barometer reading and use its indicated pressure instead of 101.325 kilopascals.Allan Robinson has written numerous articles for various health and fitness sites. We will examine them in detail. A water column manometer refers particularly to some U-formed tube full of water. Large pressure differences are measured with heavy fluids, such as mercury (e.g. Note that the left and the right tube must in the same declined plane for the angle to the horizontal plane to be correct.The pressure difference in a inclined u-tube manometer can be expressed asInclining the tube manometer increases the accuracy of the measurement.We use the same data as in the example above, except that the U-Tube is inclined The pressure difference head can then be expressed as:This calculator can be used to calculate the differential pressure measured with an U-tube manometer. 760 mm Hg = 1 atmosphere).

If you really can’t stand to see another ad again, then please We use cookies to make wikiHow great. A simple manometer consists of a U-shaped tube that contains a liquid.

The pressure reading is always the difference between fluid heights, regardless of the tube sizes. Did you measure the pressure correctly?

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If you are using an analog barometer at home or a digital barometer on your cell phone in the U.S., the barometric reading will likely be reported in inches of mercury (inHg). Just read the level of both columns and subtract the to get the difference in mm or inches. Only emails and answers are saved in our archive. Some of our calculators and applications let you save application data to your local computer.