Locator, device and method for electronically locating and reading the setting of an adjustable valve

A method for electronically locating a magnetic center of an implanted magnetic adjustable valve exhibiting a fluid flow reference axis (Ax) and a center furnished with a magnetic dipole (24), wherein said method comprises of the following steps:

• pinpointing the fluid flow reference axis (Ax) for flow of fluid through the valve (10),
• activating a mechanism for electronically detecting a magnetic field (36, 74, 82) at predetermined measurement positions (α1-α12) angularly and uniformly distributed in a circle around an axis (X-X′),
• electronically measuring the magnetic field (CM) emitted by the valve at the predetermined measurement positions (α1-α12),
• displacing the mechanism for electronically detecting a magnetic field until the magnetic field measured is substantially the same at substantially diametrically opposite positions, the magnetic center of the valve being in the center between said opposite positions.