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A pressure gauge is an instrument that measures the pressure in a vessel, a line, or whatever the pressure gauge is connected to. Pressure gauges come in at least two different types: differential pressure gauges, and absolute pressure gauges. Differential pressure gauges measure - surprise - DIFFERENCES in pressure. Pressure gauges that read "zero" when not attached to anything would actually be differential gauges that measure the difference between atmospheric pressure and the pressure of whatever they are attached to. Vacuum gauges are differential gauges that measure how far BELOW atmospheric pressure the pressure is in a vessel or pipe. Gauges that measure "gauge pressure" are just differential gauges that are calibrated to measure zero at atmospheric pressure. Absolute pressure gauges would only read "zero" if they were attached to an absolute vacuum. A common type of absolute pressure gauge is a barometer. Strictly speaking, a mercury barometer is really a differential gauge that measures the difference between the vapor pressure of the mercury and the surrounding atmosphere, but the vapor pressure of the mercury is so low that the error in treating it as an absolute pressure gauge is generally negligible. There are many different kinds of gauges used to measure pressure including: Instruments hydrostatic - These measure pressure according the height of a liquid in a column. The height of the liquid is proportional to the pressure. Common types of hydrostatic gauges include: manometers, McLeod gauges, and piston gauges. aneroid - The pressure sensing element may be a Bourdon, a diaphragm, a capsule, or a set of bellows, which will change shape with changes in the pressure of whatever the gauge is attached to. The deflection of the pressure sensing element is read by a linkage connected to a needle or by a secondary transducer. The most common secondary transducers in modern vacuum gauges measure a change in capacitance due to the mechanical deflection. Gauges that rely on a change in capacitance are often referred to as Baratron gauges. Electronic sensors thermal conductivity - including two wire and one wire gauges that measure pressure via changes in the thermal conductivity of the wires as they are placed under strain. Something like this is used in a lot of electronic bathroom scales. ionization gauges - These are primarily used for measurements of low-pressure gasses. They sense pressure indirectly by measuring the electrical ions produced when the gas is bombarded with electrons. Fewer ions will be produced by lower density gases. they have to be calibrated against another type of pressure gauge and depend on the gas being measured.
depends on the type of measure
Side-by-side
Joules
Acute
A Bourdon Tube or a Bellows gauge
A bourdon gauge is a type of aneroid gauge. It is used to measure pressure.
Because it can measure gauge of wire and has screw type structure.
"Gauges" is a slang term for large gauge plug jewelry. Technically "gauge" is the measure of the thickness of any type of body jewelry, including standard earring posts.
A rain gauge can be of any size, as it is just some type of container used to measure how much rain falls in an area.
The Pirani gauge is a robust thermal conductivity gauge used for the measurement of the pressures in vacuum systems. This gauge is used to measure the pressure between 0.5 torr to 10-4 torr.
Bourdon gauge is a type of aneroid pressure gauge consisting of a flattened curved tube attached to a pointer that moves around a dial. As the pressure in the tube increases, the tube tends to straighten and the pointer indicates the applied pressure.
the air guage machine has a spindle type guage as we have go guages for plu go and no go guage, that spindle is being inserted into the hole required to measure its ID and ovality. that spindle has passage to pass air through it alaonge its axis and at the end that passage divides into two opening alonge its diameter when air is passed thorugh the spindle( gauge) it passes though the spindle and get out throgh these two openings now if the spindle ( guage ) is inserted into the hole, it quases a drop in the pressure which is sensed by the pressure gauge mounted on the air guage machine, and that is converted into the dial guage in microns and v get redings in microns :) There are several systems of converting the back pressure in to a display measure, like diaphragms, transducers etc which have their own errors, calibration etc and all these together make the measurement system and we see complicated result.
This is a type of instrument that is used by meteorologists and hydrologists to gather and measure the amount of snow over a period of time.
The meter used to measure preciptation is called a rain gauge. Rain gauges only measure rainfall not preciptation because precipitation includes mostly anything falling from the sky. I do not believe there is one device to measure all types of precipitation. Although I believe there is such a thing as a hail pad to measure hail I am not certain.
10 gauge
12 gauge