Pressure is the amount of force acting per unit area. As to the units of pressure measurements, PSI ( pounds per square inch), bar and other units of measure such as kg/cm2, inH2O, mmHg, Pa are common to see.
There are also different types of pressure to consider. The type of pressure refers to the zero reference point of a measurement. For example: pressure falls into several types according to the zero reference point, involving:
