FerrAlert™ Halo II Plus guards at the entrance into the MRI exam room, providing the most precise and reliable detection of medium to large ferromagnetic threats. FerrAlert™ Halo II Plus provides significant assistance in the prevention of serious injury to patients and staff or equipment damage. FerrAlert™ detectors are recognized to be the most accurate ferromagnetic detectors for MRI due to their exclusive location-specificity feature. FerrAlert™ detectors have been independently tested to be the most sensitive in real-world MRI environments due to its unique and patented sensor technology.