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A compound pressure gauge measures two scales, one in positive pressure and one in negative (below atmospheric) pressure or vacuum

positive pressure is measured in pounds per square inch (psi)

or kilopascals or in some cases bars (1 bar = 14.35 psi) [ the average atmospheric

pressure at 1000 feet above sea level]

vacuum is measured in millimeters of Mercury mmHg or inches of mercury inHg

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Q: A compound pressure gauge for the low side of the system measures pressure in what?
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What does a compound pressure gauge measure?

i need to explain what an absolute pressure gauge measures


What gauge measures both vacuum and 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.


Can bourdon's tube pressure gauge be used to measure negative pressure?

Bourdon's tube pressure gauge cannot be used to measure negative pressure. This is because absolute pressure must be measured and the Bourdon gauge only indicates the gauge pressure.


What does PSIG indicate?

Psig (pound-force per square inch gauge) is a unit of pressure relative to atmospheric pressure at sea level. By contrast, psia measures pressure relative to a vacuum (such as that in space). Most pressure gauges, such as tire gauges, are calibrated to read zero at sea level, because most applications require the difference of pressure. At sea level, Earth's atmosphere actually exerts a pressure of 14.695948804 psi. If a pressure gauge is calibrated to read zero in space, then at sea level on Earth it would read 14.695948804 psi. Thus a reading of 30 psig on a tire gauge, represents an absolute pressure of 44.695948804 psi.


How many millimeters is 8 gage?

There are a number of different sets of data, in which '8 gauge' occurs. In the British system, a number 8 SWG (standard wire gauge) measures 4.064 mm. In a US system, a number 8 AWG (American Wire Gauge) measures 3.264 mm. There are also sheet steel gauges which differ from the above, and wire gauges for musical instruments have different definitions again. Different again, are the gauges used for hypodermic needles. It is vital to specify which gauge system you use.

Related questions

What does a compound pressure gauge measure in?

The Compound Gauge measures above and below atmospheric pressure (in psig and inches of mercury).


What does a compound pressure gauge measure?

i need to explain what an absolute pressure gauge measures


What a compound gauge measures pressures?

pressure and temperature


What is pressure gauge and how much pressure it can reduce?

A pressure gauge simply measures and visibly indicates pressure in a system . It does not reduce the pressure. For that you need a PRV (pressure reduction valve ).


Difference between pressure gauge and vacuum gauge?

A pressure gauge measures blow, a vacuum gauges measures suck


Definition of a compound gauge?

A compound gauge is a pressure gauge that displays both negative and positive gauge pressure measurements. Gauge pressure is a measurement of pressure relative to ambient pressure. For example, if ambient pressure was 14.7 PSI and you were to measure absolute vaccum using a compound gauge, the gauge would indicate -14.7 PSI.


Why pressure gauge is called a gauge not a meter?

Because Pressure gauge measures the the differenceof pressure so it is called pressure gauge not meter.


Gauge pressure and absolute pressure?

Gauge pressure is what you get when you take the reading from your tire pressure gauge. Absolute pressure is the pressure inside your tires plus the atmospheric pressure, which is roughly; 14.7 psi, 101.3 kPa (kilo-Pascals), or one atmosphere. Absolute pressure measures all of the pressure on your tires, inside and out, whereas gauge simply measures the pressure inside the tire.


What is high-side gauge definition?

On a manifold gauge set, there are two gauges. The gauge encased in red measures pressure on the high pressure (discharge) side. That's the "high side gauge". The other will be incased in blue, and measures vacuum pressure on the low side.


What instrument measures pressure within a water system?

It's usually just called a "pressure gauge", the assumption being that you know, or a label on it tells you, that it is measuring water-pressure.


What is tool that measures air pressure?

A tool that measures air pressure in a tire or going through a pipe is called an air pressure gauge.


What instrument measures air of wheels?

tyre pressure gauge.