Vacuum pressure is the pressure inside a vacuum whereas vapour pressure is the pressure that a vapour exerts on its condensed form when the condensed form and the vapour are in equilibrium with each other.
This is the fundamental difference between vacuum pressure and vapour pressure. Moreover, a notable difference between vacuum pressure and vapour pressure is that the vacuum pressure is a negative pressure while the vapour pressure is always a positive value.
In addition to that, vapour pressure changes with the temperature changes, but the vacuum pressure does not change. Moreover, the vacuum pressure relates to a vacuum while vapour pressure relates to solids and liquids that are in equilibrium with their vapour phase. We can say this as the key difference between vacuum pressure and vapour pressure. The below infographic tabulates the difference between vacuum pressure and vapour pressure in more detail. Pressure is the force that exerts on a unit area.
Vacuum pressure and vapour pressure are two types of pressure. The key difference between vacuum pressure and vapour pressure is that vacuum pressure relates to a vacuum whereas vapour pressure relates to solids and liquids. Examples are hydraulic gauges where atmospheric pressure changes will have a negligible effect on the accuracy of the reading, so venting is not necessary.
This also allows some manufacturers to provide secondary pressure containment as an extra safety precaution. A vacuum gauge is used to measure the pressure in a vacuum—which is typically divided into two subcategories, high i. To select the right pressure device for a specific application requires one to know the desired pressure range and the capability of the pumping system to achieve the desired pressure. Vacuum sensors measure a certain pressure in comparison to a reference pressure and can be divided into absolute, gage and differential devices Fig.
An intermediate vacuum is often considered in the range of 10 -3 to 10 -4 Torr. The process application normally dictates the vacuum level. For applications requiring monitoring both decreases in pressure below atmospheric pressure and increases in pressure above atmospheric pressure, differential pressure psid is normally used.
It is positive and can relate to a reference pressure Fig. Gauge Pressure: It is the pressure, zero referenced against ambient pressure. Atmospheric Pressure : It is the pressure exerted by the weight of the atmosphere. Vacuum Pressure : It is the pressure below atmospheric pressure is measured by vacuum gauges.
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