Vernier Calliper IME type

Vernier Calliper Least Count

The least count of a vernier calliper is the smallest measurement that the instrument can make. It is determined by the difference between one main scale division and one vernier scale division.

The main scale is the long scale on the vernier calliper. It is divided into equal divisions, typically millimetres or inches. The vernier scale is a shorter scale that is placed alongside the main scale. It has the same number of divisions as the main scale, but the divisions are slightly smaller.

To find the least count, you can use the following formula:

Least count = (Main scale division) / (Number of vernier scale divisions)

For example, a vernier calliper with a main scale division of 1 mm and 20 vernier scale divisions will have a least count of 0.01 mm. This is because 1 divided by 20 is 0.05, so the smallest measurement that the instrument can make is 0.01 mm.

The least count of a vernier calliper can be as low as 0.01 mm, but it is typically between 0.02 mm and 0.05 mm. The higher the least count, the less precise the measurement.

Here are some examples of the least count of vernier callipers:

• 0.01 mm: This high-precision vernier calliper is used to measure small objects.
• 0.02 mm: This standard vernier calliper is used for general-purpose measurements.
• 0.05 mm: This lower-precision vernier calliper is used for less accurate measurements.

When choosing a vernier calliper, it is important to consider the least count that you need for your application. If you need precise measurements, you will need a vernier calliper with a low least count. If you only need to make less accurate measurements, then you can use a vernier calliper with a higher least count.