This location calls for a recessed contact and magnet.
Sliding patio door hook up alarm wire.
If the sensor is recessed you will need to pull it out from the door frame to access the screw terminals.
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Complete the following steps to replace wired door alarm sensors.
They can be used with the new.
You do not need to fish the wires out from the wall.
Using a surface mount magnetic door switch and will make this easier in most cases.
The second best location for alarm wiring is at the opening side about 18 above the floor.
Remove the old sensor.
It is also very important to choose a door contact that is compatible with the alarm system that is being used.
Use a screwdriver to disconnect the wires from the old sensor.
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In most cases it is wise to use a surface mounted sensor with a sliding door.
Both wireless and hardwired sensors can be used for this purpose.