They are placed on doors or windows.
Ring contact sensor door molding.
When the alarm system is armed they will trigger an alarm as soon as their magnetic contact is broken by the door or window opening.
Aeotec recessed door sensor gen5 is a battery powered z wave plus based magnetic door sensor with an extremely small form factor.
Contact sensors are two part devices connected by a strong magnetic field.
1 best options for installation.
Panel recommended number of contact sensors.
Unlike other z wave door window sensors recessed door sensor gen5.
Aeotec recessed door sensor gen5 invisible z wave plus security and open close sensor battery powered.
While this is the easiest.