Angular Measurement

The concept of Angle comes from the circle. Actually, Angle is a part of a circle. We measure an angle in Degree or Radian. Usually, the primary objective of angle measurement is not to measure angles but the assessment of the alignment of machine parts or products.

Angle is defined as the opening between two lines which meet at a point.
In a current scenario, there is a wide range of angle measuring instruments available, from simple scaled instruments to complex types of techniques.
Some Basic Angle Measuring Instruments are

Bevel Protractor


Digital Protractor


Sine Bar


Spirit Level

Vernier Protractor
A Vernier Protractor is an instrument, provided with a mechanical support or a simple mechanism to position them accurately against the given work-piece and lock the reading.

Spirit Level
A Spirit Level has universal applications, for aligning structural members such as beams and columns in various engineering fields.

Conventional/Electronic Clinometers
Conventional or Electronic Clinometers are instruments employing the basic principle of a spirit level but with higher resolution.

Collimators and Angle Dekkors are the most precise instruments.

A simple protractor is a basic device used for measuring angles with a leased count of 1° or 1⁄2° with limited usage. A few additions and a simple mechanism, which can hold the main scale, a vernier scale, and blade, can make it very versatile.

Types of bevel protectors:
1. Universal bevel protractor
2. Optical bevel protractor

To know about the various Angular measuring instrument, please visit sub-section Angular Measurement of Menu.

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