What is advantage and disadvantage of comparative?

Advantages of Mechanical Comparator:

1.They do not require any external source of energy.

2.These are cheaper and portable.

3.These are of robust construction and compact design.

4.The simple linear scales are easy to read.

5.These are unaffected by variations due to external source ofenergy such air, electricity etc.

Disadvantages:

1.Range is limited as the pointer moves over a fixed scale.

2.Pointer scale system used can cause parallax error.

3.There are number of moving parts which create problems due to friction, and ultimately the

accuracy is less.

4.The instrument may become sensitive to vibration due to high inertia.