Are you still using coils to generate magnetic field? Why not use Microtest solution with 3 axis PCB field generation?
- Microtest patent solution for magnetic field generation
- Coil less solution – magnetic fields from pcb socket board
- 3 Axis XYZ fields generation
- Absolute accurate magnetic field calibration available
- 32sites solution already in production
- Single magnetic reference per site
- Mechanical parts / sockets around device under test completely a-magnetic