The SSL-DOOR sensor is a device, which connects to the SSL-EMD. When a door/window is opened the magnetic field is broken. Through the SNMP-SSL card, the user can monitor it and receive notifications of the alarms.

SSL-DOOR sensors are commonly used in burglar alarm systems as door/window open sensors; however they can be disabled if they are in a strong, external magnetic field. If a security sensor is dropped onto a hard surface from more than 30cm or subject to shock of more than 30G, it is possible to cause the characteristics to change (Pull-in, Drop-out, etc.).