Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Source: Wikipedia
To measure the same their are certain engineering solutions available out there outs of which one is Pressure Gauge.
A pressure gauge is a device/instrument used for measuring pressure.
In detail pressure gauge is,
A fluid intensity measurement device. Pressure gauges are required for the set-up and tuning of fluid power machines and are indispensable in troubleshooting them. Without pressure gauges, fluid power systems would be both unpredictable and unreliable. Gauges help to ensure there are no leaks or pressure changes that could affect the operating condition of the hydraulic system.
