Best Air Plug Gauge Manufacturer in Gurugram ( Haryana) Air plug gauge, also known is an air gauge or air plug, is a precision measurement tool used in metrology to inspect the internal dimensions of bores or holes. Here\'s how it generally works: Working : Air plug gauges operate on the principle of measuring the pressure difference between the reference air pressure and the pressure inside the gauge when it is inserted into a hole. Components: It consists of a cylindrical body with a measuring head that fits into the bore being measured. The measuring head contains a sensing element (often a piston or diaphragm) connected to a pressure gauge or electronic sensor. Inspection Process: Air plug gauge is inserted into the bore or hole, and air ( pressure) is supplied to the gauge. The air inside the gauge is allowed to reach equilibrium with the pressure inside the bore. The resulting pressure reading on the gauge indicates the size of the bore. The difference in pressure between the gauge and the bore corresponds to the size of the bore. Advantages: High accuracy : Air plug gauges are known for their precision, often capable of measuring to very tight tolerances. Non-contact measurement: Air Plug gauge do not physically touch the bore walls, which can be advantageous for delicate surfaces. Quick measurements: They provide rapid measurements once the gauge is inserted and pressurized. Applications: Where precision measurement of bores or holes is critical, such as automotive, aerospace, and manufacturing of engine components. Suitable for measuring cylindrical bores, taper bores, and other internal features where tight tolerances are required.