Cornell 4560-017 Surface-Mount Magnetic Door Contact

Specifications:

Cornell 4560-017 Surface-Mount Magnetic Door Contact consist of two components: The Contact, consisting of a Reed Switch and screw terminals concealed within a small housing. This component mounts to the Door Frame with Field Wiring being terminated to it. Most of the Field Wiring is usually concealed within the Frame and Jamb of the door. The internal Reed Switch is actuated when it is in the presence of the magnet’s field. The Magnet, which mounts to the door, nearly touching the Contact when the door is closed. Magnetic Contacts are highly reliable, long-life devices – mainly because the reed switches are encapsulated inside small glass tubes filled with inert gas; minimizing corrosion of the contacts within. Magnetic Contacts are usually more secure than Rollerball / Plunger Types – because as soon as the door is opened by a few inches, the Magnet and Contact become sufficiently separated to Actuate.