How to measure with vernier calipers

With the vernier calipers we can measure the thickness of glass plates,metal sheets,lengths of objects like cylinders,tubes.We can also measure the external and internal diameters of the tubes and rings.We can also measure the depth of tubes and the water level in a jar.
Description of Vernier Calipers: A Vernier calipers consists of mainly two parts i) A 2cm wide 15cm long rectangular metal strip .The left end bottom side of this strip consists of a fixed jaw 1 and at the same end jaw 2 at the top of this strip. On the strip a scale (5)is graduated in Inches along the upper edge and another scale(4) is graduated in Centimeters along the lower edge. This is called Main Scale 'S' .ii) A metal frame V called vernier slides over the Main Scale 'S' . At the bottom of this frame V a button 8(P) is attached,which helps to fix this vernier at any desired place on the main scale.This verier frame consists of jaw1 (B) at the bottom and a jaw 2(D) at the top .Two scales are graduated on this frame corresponding to two scales on the Main Scale 'S'. The two scales 6 and 7 on the vernier are called Vernier scale.Vernier scale consists of equal number of divisions. When we move vernier frame over the main scale, a thin strip (3) will be projected out.The projection will be exactly equal to the distance between Jaws 1(AB) i.e the thickness of the object between jaws.
The lower jaws 1,1(AB) are used to measure the thickness or external diameter of the tubes,cylinders or spheres.
The upper jaws 2,2 (CD) are used to measure the inner diameters of hallow bodies like tubes or holes.
The thin strip ( 3) is used to measure the depth of the objects like test tubes.
Theory : Principle of vernier calipers - N divisions on the vernier scale is equal to (N-1) divisions on the main scale.

N V.S.D = (N-1) M.S.D

1 V.S.D = {(N-1)/N} M.S.D

Least count (L.C) of vernier calipers : Minimum length or thickness measurable with the vernier calipers is called its least count.

Least count (L.C) = 1 M.S.D - 1 V.S.D

L.C = 1 M.S.D - {(N-1)/N} M.S.D

L.C = 1 M.S.D [ 1-{(N-1)/N}]
L.C = (1 M.S.D )/N = S/N

Where S is the value of one Main scale division and N is the number of equal divisions on the vernier scale.

Procedure : First we have to determine the least count count of the given vernier calipers.

To determine the volume of the cylinder we have to determine a)the length of the cylinder and b) radius of the cylinder and substituting these values in the equation for the volume of the cylinder we can calculate it.
Tables and calculations are elaborately explained in my blogs i) ii)


Related Articles

How to prevent acne scars?

This article explains various measures which keep acne under control. This decreases inflammation and consequently chances of formation of acne scars too decreases. Actions like not picking at skin, proper hydration, using sunscreen lotions, proper skin care regime etc prevent formation of acne scars.

How To Control Anger?

Have you ever been angry and later on felt sad for being angry on some one or something? Do you want to control your anger ? Is anger good or not ? The following article will discuss about anger and measures through which we can control our anger.

How to remove blood stains from delicate fabrics and specific surfaces?

This article explains various tips and methods to get rid of blood stains from delicate fabrics like silk, satin, woolen, linen etc and from specific surfaces like concrete, hardwood floors, mattress, quilt, leather, carpets etc. These methods used can make them free from blood stains.

Top 9 tips and exercises to sharpen the mind and boost brainpower

The brain needs constant stimulation to remain alert and active. Practice good habits that can sharpen your memory and help you stay alert and on top of your game at all times. Simple lifestyle changes that involve the number of you sleep or what you eat or how you relax can play a great role in how your brain functions. Find out what you need to do right, to get the best out of your grey cells.

How to become a pathologist with top hospitals in India

Are you looking for a career in medicine as a clinical pathologist? Need to know how to start a pathology lab? This article provides complete information on the different specializations in pathology and a career guide on starting a career as a pathologist. You will also get a general idea on the approximate costs of setting up your own path lab.

More articles: How to


No responses found. Be the first to comment...

  • Do not include your name, "with regards" etc in the comment. Write detailed comment, relevant to the topic.
  • No HTML formatting and links to other web sites are allowed.
  • This is a strictly moderated site. Absolutely no spam allowed.
  • Name: