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  2. Hall effect sensor - Wikipedia

    en.wikipedia.org/wiki/Hall_effect_sensor

    A Hall probe is a device that uses a calibrated Hall effect sensor to directly measure the strength of a magnetic field. Since magnetic fields have a direction as well as a magnitude, the results from a Hall probe are dependent on the orientation, as well as the position, of the probe.

  3. EMF measurement - Wikipedia

    en.wikipedia.org/wiki/EMF_measurement

    E-field projections on an orthogonal reference frame. Measurements of the EMF are obtained using an E-field sensor or H-field sensor which can be isotropic or mono-axial, active or passive. A mono-axial, omnidirectional probe is a device which senses the Electric (short dipole) or Magnetic field linearly polarized in a given direction.

  4. Hall effect - Wikipedia

    en.wikipedia.org/wiki/Hall_effect

    The Hall coefficient is defined as the ratio of the induced electric field to the product of the current density and the applied magnetic field. It is a characteristic of the material from which the conductor is made, since its value depends on the type, number, and properties of the charge carriers that constitute the current.

  5. MEMS magnetic field sensor - Wikipedia

    en.wikipedia.org/wiki/MEMS_magnetic_field_sensor

    A MEMS magnetic field sensor is a small-scale microelectromechanical systems (MEMS) device for detecting and measuring magnetic fields (magnetometer). Many of these operate by detecting effects of the Lorentz force : a change in voltage or resonant frequency may be measured electronically, or a mechanical displacement may be measured optically.

  6. Magnetometer - Wikipedia

    en.wikipedia.org/wiki/Magnetometer

    The Earth's magnetic field at a given point is a vector. A magnetic compass is designed to give a horizontal bearing direction, whereas a vector magnetometer measures both the magnitude and direction of the total magnetic field. Three orthogonal sensors are required to measure the components of the magnetic field in all three dimensions.

  7. Current sensing - Wikipedia

    en.wikipedia.org/wiki/Current_sensing

    Fluxgate sensors or saturable inductor current sensors work on the same measurement principle as Hall-effect-based current sensors: the magnetic field created by the primary current to be measured is detected by a specific sensing element. The design of the saturable inductor current sensor is similar to that of a closed-loop Hall-effect ...

  8. Large Plasma Device - Wikipedia

    en.wikipedia.org/wiki/Large_Plasma_Device

    The relatively low electron temperature makes probe construction straightforward and does not require the use of exotic materials. Most probes are constructed in-house within the facility and include magnetic field probes, [9] Langmuir probes, Mach probes (to measure flow), electric dipole probes and many others. Standard probe design also ...

  9. Eddy-current testing - Wikipedia

    en.wikipedia.org/wiki/Eddy-current_testing

    Attempts to overcome this fundamental limitation using low frequency coils and superconducting magnetic field sensors have not led to widespread applications. A recent technique, referred to as Lorentz force eddy current testing (LET), [ 13 ] [ 14 ] exploits the advantages of applying DC magnetic fields and relative motion providing deep and ...

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