What is a Flux Meter : Working & Its Applications

Flux meters are available from the past many years which are used for measuring the density of magnetic flux. So that total flux can be determined within a magnet otherwise magnetic assembly. In some focused areas, the usage of these meters was reduced because of some factors like the complexity of light beam in flux meter while setting up otherwise ballistic galvanometer, Ohmic resistance limitations for search coils, operating skills are required for checking the meter, etc. These are found in several magnetic measurement applications. To overcome these limitations and drawbacks, flux meters are used. This article discusses an overview of what is flux meter, working, and its applications.

What is Flux Meter?

Definition: A Flux meter is one kind of electronic device including a digital display. This instrument is used to measure the magnetic flux in stable magnets, quality control & magnetic products sorting. These meters are flexible to use in production and laboratory enterprise. Most of the meters have these functions like value hold is high. Most of these meters have functions such as maximum value, an indication of automatic pole & measuring ranges are different. So these meters are used for measuring the impulse magnetic field that mainly depends on a resonance of magnetoplasma & generates an audio‐frequency signal. The signal frequency is relative to the magnetic field. The flux meter diagram is shown below.

Flux Meter
Flux Meter

Flux Meter Working Principle

When magnetic flux cuts throughout the search coil, then the voltage can be induced within the search coil. According to the Faradays law, this voltage is the disparity of the magnetic flux that flows throughout the search coil. By giving this voltage to this flux meter, the process of integration can remove the differential within the meter to display the whole magnetic flux. These meters use an active component for the measurement when it is required for magnetic flux to slash the search coil for generating a voltage.

By adjusting this meter through the area & number of windings in the search coil, the value of flux density and magnetic flux values can be displayed on a fluxmeter.

Construction of Flux Meter

This meter construction is illustrated below. In the following diagram, the design of this meter can be done with a coil. This coil can be suspended using the silk thread and the spring. Now the coil moves freely among the two poles of the magnet. The current flows through the coil using the helices. Here helices are extremely thin and designed with annealed silver strips. The current in the coil can decrease the controlling torque to the least value. The coils air friction damping can be insignificant.



The connection of this can be done by connecting the meter terminals across the coil. Once the flux is linked to the search coil, then the coil will be changed by either changing the direction of the magnetic field otherwise changing it from the magnetic field.


The flux change will induce the electromotive force within the coil and sends it through the meter. So the meter pointer can deflect due to the current and their deflection is directly proportional to the change in the value of flux linkages.

As the variation of the flux linkages reduces, the coil stops moving because of their high electromagnetic damping. This high electromagnetic damping can be occurred because of the low resistance between the meter & the coil in the circuit.


The advantages of flux meter include the following.

  • These meters are moveable.
  • This meter scale is adjusted in Weber meters.
  • The coil deflection is free from the time taken through the flux to modify.
  • This meter operates and detects very conveniently
  • The magnetic flux value can be evaluated & transferred.
  • The overall performance can be reflected by magnetic flux
  • It is an ideal device so measures flux & magnetic flux.


The disadvantages of flux meter include the following.

  • This is less sensitive & precise when compared with another meter
  • The design of the test coils is not easy.
  • These are heavy & inefficient


The applications of flux meter include the following.

  • Field Surveyors
  • Measurement of the magnetic field
  • Hysteresis Loop Tracers
  • Magnetic material research
  • Test Systems in Production
  • Voltage Integration
  • Magnetic components quality control
  • DC can be measured
  • Magnetic Fields
  • Ferro Magnetic Detectors
  • Magnetic Shielding Effective Errors
  • Quality control & development of the magnetic system

Thus, this is all about an overview of flux meter. From the above article finally, we can conclude that this is one kind of instrument that uses an electron integrator to measure inductive voltage, space magnetic field & magnetic materials research. This is very suitable for high field measurements at less temperature. This instrument depends on a magnetoplasma resonance & generates an audio‐frequency signal. The frequency of this signal is relative to the magnetic field. Here is a question for you, what are the different types of meters available?