Purposed for the Mag-03MC probes of cylindrical
body. The unit integrates a Helmholtz coil, the waveform generator and the
battery. It generates a 190 Hz sinusoidal alternating magnetic field.
Low cost, lightweight, miniature Helmholtz coil, well
suited for a wide variety of probes wich are holded by a
purposely-designed device. It supplies a calibrated field with a ratio
according to: 1 µT/1 mA (10 mGs/1 mA).