The following mechanical measuring instruments are explained with theory and images.

Linear Measurements (Non precision instruments)

-Steel Rule

-Calipers

-Inside caliper

-Outside caliper

-Spring caliper

-Hermaphrodite caliper

-Transfer caliper

-Dividers

-Telescopic gauge

-Depth gauge

Linear Measurements (Precision instruments)

-Micrometer

-External micrometer

-Inside micrometer

-Vernier micrometer

-Screw thread micrometer

-Depth micrometer

-Vernier caliper

-Vernier height gauge

-Slip gauges

-Comparators

-Mechanical Comparator

-Mechanical-Optical Comparator

-Electrical Comparators

-Pneumatic Comparator

Angular Measurements (Non precision instruments)

-Protractors

-Bevel gauge

-Engineers square

-Combination set

Angular Measurements (Precision instruments)

-Bevel protractor

-Dividing head

-Sine bar

-Spirit level

-Clinometers

-Autocollimator

-Taper measurements

Surface Measurements

-Straightedge

-Surface plate and surface gauge

-Optical flat

-Profilometer

-Profilograph

-Use of laser