Usage Tips:Constructed from robust metal, this magnetic switch alarm sensor ensures durability and reliability for both industrial and residential overhead doors, providing a secure solution for environments with wide gaps. Featuring a protective metal tube, this sensor is designed to withstand harsh conditions, ensuring long-lasting performance and reliability in securing your overhead garage doors against unauthorized access. Epoxy sealed for enhanced water resistance, this magnetic switch alarm sensor offers superior protection against moisture and environmental conditions, making it ideal for use in a variety of settings. This versatile sensor comes with an adjustable L bracket, making it easy to install and suitable for most door-channel widths. Its flexibility allows for a hassle-free setup in diverse door configurations. Ideal for overhead doors with wide gaps, this sensor is perfect for both industrial applications and residential use, providing a dependable security solution that helps to monitor and protect your property effectively. Magnetic contacts is widely used for alarm system(panel) to detect state of door. It consist of a switch part and a magnet part . When door closed, switch is effected by magnet and turn ON; when door open, switch is effected by magnet and turn OFF, trigger alarm. Contact type: NC (normally closed),switch OFF when door is opened Operation : ≥ 50mm Mounting type: mounting Max. voltage: 28V DC Max. current: 0.2A Max. load: 3W Color: Silver Material: Metal The actual product may have slight color difference or difference, which not affect the use Package Contents: 1 x Magnetic Switch Alarm Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.