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A pressure gauge measures blow, a vacuum gauges measures suck

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2009-08-03 06:14:46
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Q: Difference between pressure gauge and vacuum gauge?
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Related questions

What is the difference between a absolute pressure and a gauge pressure?

The gauge pressure is the difference between absolute pressure and atmospheric pressure.


What is the difference between normal pressure gauge and differential pressure gauge?

A pressure gauge indicates actual pressure and a differential pressure gauge indicates the difference in pressure.


What is vacuum gauge pressure?

Gauge pressure usually refers to the pressure difference between ambient, atmospheric pressure and the pressure in a vessel or line. A gauge pressure of zero would mean that the vessel or line was at atmospheric pressure. Normally the pressures of interest are ABOVE atmospheric so the gauge pressure is positive. Vacuum gauge pressure measures how far BELOW atmospheric pressure a vessel or line is. As such vacuum gauge pressure may be measured as a negative number - or for convenience it may be reported as a positive number with the caveat that it is "vacuum gauge pressure", meaning that the reported pressure is how far atmospheric pressure is above the pressure in the vessel or line.


Difference between Absolute and gauge pressure?

Absolute pressure = gauge pressure + atmospheric pressureWhen using a pressure gauge, like when measuring the pressure of the air in a tire, the gauge is actually reading the difference between the atmospheric pressure and the atmospheric pressure. So if the gauge measures 30 psi, and taking atmospheric pressure at about 14.7 psi, the absolute pressure in the tire is actually about 44.7 psi. If the tire is flat, then the gauge will read zero psi, but there is not a vacuum - there is still some air present in the tire, and the absolute pressure of this air is the same as the atmospheric pressure (about 14.7 psi).See related link: Guide to the Measurement of Pressure and Vacuum.


What gauge measures both vacuum and pressure?

Differential Pressure Gauge


What are the difference between hydraulic and gauge pressures?

hydraulic pressure:- it is the pressure of the hydraulic liquid. gauge pressure:- it is the pressure acting on the gauge(pressure measuring instrument).


What is the difference between gauge pressure and absolute pressure?

absolute pressure is 0.


What type of pressure gauge can measure vacuum pressure?

A Bourdon Tube or a Bellows gauge


What instrument measures absolute pressure?

vacuum pressure gauge


What are you measuring when you measure air preasure?

The difference in pressure between absolute and gauge pressure.


How is vacuum pressure read?

You need a vacuum gauge and it is reed in inches.


Is gauge pressure is the sum of true pressure and atmospheric pressure?

No, it is the DIFFERENCE between the true and atmospheric pressures.

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