Magnetostrictive waveguide wire for level gauge and displacement sensor
- Magnetostriction is a property of ferromagnetic materials such as iron, nickel, and cobalt. When placed in a magnetic field, these materials change size and/or shape
- An important characteristic of a wire made of a magnetostrictive material is the Wiedemann effect
- When an axial magnetic field is applied to a magnetostrictive wire, and a current is passed through the wire, a twisting occurs at the location of the axial magnetic field
- The twisting is caused by interaction of the axial magnetic field, usually from a permanent magnet, with the magnetic field along the magnetostrictive wire, which is present due to the current in the wire
- The current is applied as a short-duration pulse, -1 or 2 µs, the minimum current density is along the center of the wire and the maximum at the wire surface
- This is due to the skin effect
- The magnetic field intensity is also greatest at the wire surface
- This aids in developing the waveguide twist
- Since the current is applied as a pulse, the mechanical twisting travels in the wire as an ultrasonic wave
- The magnetostrictive wire is therefore called the waveguide
- The wave travels at the speed of sound in the waveguide material, - 3O00m/s
Application:
- Magnetostrictive level gauge
- Magnetostrictive level sensor
- Magnetostrictive position sensor
- Magnetostrictive displacement sensor
- Magnetostrictive linear displacement transducer
- Magnetostrictive transducer
- Other sensors where magnetostrictive wire needed
Size range:
0.15-1.0mm
Stock size:
