Accuracy of a Vernier Caliper!
Before even going into what a Vernier caliper is, let’s first know what a caliper is.
A caliper is a tool or a device which is very useful in measuring the distance between any two opposite sides of an object. They do a permit reading on a ruler and the tips of the caliper are adjusted to fit across the points so as to measure the distance between them. The caliper is then removed from the points and the distance between the tips with a measuring device like a ruler.
Now, a Vernier caliper will give a direct reading of the distance which is measured with a very high accuracy and lots of precision. Also, the Vernier calipers which are functionally identical can give different results. So, these calipers have the following parts:
The outside large jaws which is used to measure the external diameter or width of an object.
The inside small jaws which are used to measure the internal diameter of the object.
Depth rod to measure or identify the depths of the object or any hole.
Main scale which is marked in millimeters. Another mail scale which is in inches and fractions.
Vernier scale which has the interpolation measurements.
Retainer which is used to block the movable part of the caliper to allow easy reading of the measurement.
How to measure the distance between two points of an object?
It is simple, you just need to read the position of the pointer which will be shown directly on the scale. Also, the pointer will be between the two markings so you can mentally interpolate while measuring which one would be more accurate. This is just the function of a simple calibrated caliper.
You can use the uppermost jaws for measuring the internal dimensions and the external dimensions are measured by using the lowered jaws. The depth probe is a slender part which can go into holes and deep groves and measure them.
So the accuracy of a Vernier caliper is around 0.01 mm or one thousandth of an inch.