Secondary instrument

Absolute instrument

Recording instrument

Integrating instrument

Heating effect

Chemical effect

Magnetic effect

Induction effect

Moving iron repulsion type instrument

Moving iron attraction type instrument

Induction type instrument

Moving coil instruments

Shunt type ohm meter

Megger

Multimeter

Series type ohm meter

It is used only in AC

It is used only in DC

Cannot be used for higher current

Cannot be used on both AC and DC