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Within firearms, chamber pressure is the pressure exerted by a cartridge case's outside walls on the inside of a firearm's chamber when the cartridge is fired. The SI unit for chamber pressure is the megapascal (MPa), while the American SAAMI uses the pound per square inch (psi, symbol lbf/in 2) and the European CIP uses bar (1 bar is equal to 0.1 MPa).
Instruments used to measure and display pressure mechanically are called pressure gauges, vacuum gauges or compound gauges (vacuum & pressure). The widely used Bourdon gauge is a mechanical device, which both measures and indicates and is probably the best known type of gauge.
A low cost method of gathering pressure data uses a resistive stress gauge attached to the exterior of the chamber. These systems are usually calibrated to emulate the results of an existing standardized system such as the SAAMI system, so that the results will be directly comparable.
These terms were adopted by convention to indicate that the pressure values were measured by copper crusher and lead crusher gauges respectively. In recent years, they have been replaced by the adoption of more modern piezoelectric pressure gauges that more accurately measure chamber pressures and generally give significantly higher pressure ...
All gauges can be divided into four main types, independent of their actual use. Analogue instrument meter with analogue display ("needles"). Until the later decades the most common basic type. [2] Digital instrument meter with analogue display. A screen that shows an "analogue meter", commonly used in modern aircraft cockpits, and some ...
Pertains to measuring instruments that measure atmospheric or underwater pressure. ... Tire-pressure gauge; V. Vacuum gauge This page was ...
A caisson gauge is a high precision (typically 0.25% to 1% of full gauge scale) pressure gauge fitted to measure pressure of the interior of a chamber relative to ambient atmospheric pressure, and pressure differences between compartments of a sealed habitat separated by airlock hatches or doors, originally in the main pressurised compartment ...
The gauges capable of measuring the lowest pressures are magnetic gauges based upon the pressure dependence of the current in a spontaneous gas discharge in intersecting electric and magnetic fields. [4] UHV pressures are measured with an ion gauge, either of the hot filament or inverted magnetron type.
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