The application of ferromagnetic detection systems is highly focused on the core capability of "identifying ferromagnetic substances." Variations in needs across different fields further subdivide their functions, which can be primarily categorized as follows:

1. Medical Field: Ensuring Safety of Magnetic Resonance Imaging (MRI) Equipment and Patients

During operation, MRI equipment generates a strong magnetic field. If ferromagnetic substances (such as metal dentures, keys, wheelchairs, etc.) enter the scanning room, they may be forcefully attracted by the magnetic field and collide with the equipment at high speed, causing "projectile injuries." Additionally, patients with ferromagnetic implants may experience displacement or heating of the implants due to the magnetic field, posing life-threatening risks.
The core applications of ferromagnetic detection systems in this context include:

• Entrance Pre-Screening: Installing detection gates or detectors at the entrance of MRI rooms to mandatorily screen individuals for ferromagnetic items (such as mobile phones, coins, belt buckles, metal accessories, etc.). Audible and visual alarms are triggered to prevent hazardous items from entering.
• Patient Screening: Assisting medical staff in confirming whether patients have undeclared ferromagnetic implants (such as early metal contraceptive devices or residual surgical metal clips) to avoid risks during MRI scans.
• Equipment Protection: Preventing ferromagnetic tools (such as wrenches, screwdrivers) from accidentally entering the magnetic field area, thereby avoiding magnetization or damage to internal components and ensuring the normal operation of MRI equipment.