Types of Mechanical Gauges and Uses

Mechanical gauges are tools which are used for measuring dimensions, pressure levels. These devices come in two variants: mechanical and electromechanical.  Pressure measuring gauges can be either analogue or digital subject to readouts.Depending on the way measurements are captured, dimensional gauges can be classified into bore diameter gauges,  depth or height gauges.

Types of mechanical gauges:

Rulers and scales: Rulers and scales are usually single steel plate type tools to measure length and perimeter of objects.

Calipers: Calipers are of two types : inside and outside calipers. They are used for measuring internal and external dimensions of an object. For comparing the measured value, an external scale is attached to these calipers. Some caliper models do come with a measuring scale.

Vernier Calipers: These precision tools are used to measure smaller distances accurately. Vernier calipers have two distinct jaws to capture measurement readings of inner and outer dimensions of an object.


Micrometers: Micrometers are more accurate than vernier calipers. They are fine precision tools used for measuring smaller distances with accuracy.

Feeler gauges: Feeler gauges are used to measure the clearance between surface and bearings.

Poker gauges: They are also known as propeller wear down and used in measuring propeller shaft clearance.

Bore Gauges: Bore gauges are used to measure the size of any hole and come in both digital and analogue variants.

American Wire Gauge: American Wire Gauges or AWGs are circular shaped tools used to measure the cross-section of electrical wires and cables.

Depth Gauges:
These gauges are used to measure the depth of slots and holes. Depth gauges are available in digital, analogue and scale variants.

Dial Gauges:
These gauges are used to measure flatness of surfaces and detecting minor deviations in linear measurements of objects. Dial gauges are also used to measure the centricity of circular objects.