Friday 16 September 2016

terminology - Gauge pressure vs. absolute pressure?



What are the key differences between Gauge pressure and absolute pressure?


Are there any other forms of pressure?



Answer



just wiki it. Anyways I will give you a oneliner from wiki itself-





  • Absolute pressure is zero-referenced against a perfect vacuum, so it is equal to gauge pressure plus atmospheric pressure.




  • Gauge pressure is zero-referenced against ambient air pressure, so it is equal to absolute pressure minus atmospheric pressure. Negative signs are usually omitted.




  • Differential pressure is the difference in pressure between two points.




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