A magneto-resistive head including: a soft-magnetic film arranged to be in contact with both end portions of the spin bulb film; and a permanent magnet film arranged so as to be in contact with the lower portion of the soft-magnetic film and not in contact with the free layer of the spin bulb film. At least one light emitting diode is attached to a circuit board that is mounted on a heat conducting member. The scanning is bypassed if the active pilot EcIo exceeds a high threshold and performed if the active pilot EcIo is between the high threshold and a low threshold. Further provided are systems for disinfecting and stabilizing organic waste, and systems for making a stable, granular bio-mineral product. Finally, the sensor includes at least one electrode at the base plate and at least one transducer for each sensing direction of the sensor subassembly responsive to the acceleration. The accessory case has an opening that can be selectively closed by a cover element.