Electrostatic Type Measuring Instrument

The working principle of the electrostatic type measuring instrument is quite simple. It depends on the attraction between two oppositely electrically charged plates. You know that as per Coulomb’s law there is always an attraction … Read more

shaded pole

Shaded Pole Type Induction Instrument

Before going through the actual working principle of shaded pole type induction instrument we will examine what happens when we place one aluminum disc in between the poles of an electromagnet. The current through the … Read more

Permanent Magnet Moving Coil Instrument

Permanent Magnet Moving Coil Instrument (PMMC)

This is a variation of moving coil instruments. There are two types of moving coil instrument. One is permanent magnet moving coil instrument and another is dynamometer type instrument. We will discuss in this article … Read more

Gravity Control Moving Iron Instrument

Working Principle of Indicating Instrument

Deflecting Torque Controlling Torque Spring Control Gravity Control Damping Torque Air Friction Damping Fluid Friction Damping Eddy Current Damping An indicating instrument essentially has three components. A pointer, A dial, A moving system. The pointer … Read more

tangent galvanometer

Types of Electrical Measuring Instruments

Absolute Instrument Secondary Instrument Indicating Instrument Recording Instrument Integrating Instrument We use various types of electrical measuring instruments in electrical engineering and science fields. We primarily categorize these measuring instruments as the absolute instruments and … Read more