Gauge for measuring gas pressure and gauge for measuring liquid pressure?
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Are there any differences between pressure gauges used for measuring gas pressure and those used for measuring liquid pressure? Can they be used interchangeably? Or what should be taken into consideration when choosing a pressure gauge?
1. Barometers designed for measuring low pressures cannot be used to measure liquids; these low-pressure barometers use diaphragms (ranging from 1 kPa to 60 kPa) as their sensing elements, and thus they are not suitable for measuring liquids. 2. Media with a range of over 100 kPa that are non-corrosive can be used; gases suitable for barometers or manometers can be used interchangeably. 3. Pressure gauges for special gases require special treatment; there are dedicated types such as acetylene pressure gauges, oxygen pressure gauges, nitrogen pressure gauges, etc., and hydraulic ones cannot be used as substitutes.
With a few exceptions for applications with specific requirements, most pressure gauge fluids and gases are interchangeable
This can be used generally; for special media, the material in contact with the liquid needs to be taken into consideration when measuring oxygen
Ordinary gases and liquids are fine; however, those that are corrosive need to be taken into consideration, as do those for which the use of oil is prohibited.