The Hikvision DS-PD1-MC-MS is a professional-grade magnetic contact sensor specifically engineered for demanding environments. Unlike standard plastic sensors, this model is encased in a zinc alloy metal shell, providing superior physical durability and resistance to wear and tear. It is primarily used to monitor the opening and closing of doors, windows, or gates in a wired intrusion system. The sensor operates using a high-quality reed switch that triggers an alarm signal when the magnetic field is interrupted by the separation of the magnet and the sensor body. Its rugged construction makes it particularly suitable for commercial warehouses, metal doors, or any application requiring a high degree of reliability and a longer service life in challenging conditions.