Magnetic contact sensors can be added to an existing wired alarm systems.
Nc no door window contact magnetic reed switch.
4 2 out of 5 stars 105.
Magnetic reed switches are available closed loop open loop spdt dpdt options with standard wide and extra wide gaps.
Nc no door window contact magnetic reed home switch alarm 3w 10 20mm.
2x abs magnetic door window reed switch contact switch alarm security system.
Weij 10 pair rc 33 nc recessed wired security window door contact sensor alarm.
1 4 super mini switch set.
20 pk white 3 8 recessed wired security.
Recessed wired security window door contact sensor alarm magnetic reed switch white rc 33 10pcs 4 1 out of 5 stars 42.
2sets magnetic reed switch normally open closed nc no door alarm window security product description.
Recessed wired security window door contact sensor alarm magnetic reed switch white rc 33 4pcs.
10x wired home window door burglar security alarm.
5 pk wired contacts.
Nc no door window contact magnetic reed switch alarm 3w 10 20mm 4 3 out of 5 stars 63 8 99 8.
Yootop 5 sets recessed wired magnet reed switch window door magnetic contact sensor alarm white 4 7 out of 5 stars 43.
Lots no nc magnetic contact reed switch door window sensor entry security alarm product description note.
Recessed wired security window door contact sensor alarm magnetic reed switch white rc 33 10pcs.
Door window nc contact security safety alarm magnetic sensor reed switch sets.
When the magnet separate the circuit is not conductive light off great for use in family and factory window door.
Nc no door window contact magnetic reed switch alarm 3w 10 25mm.
1 pair magnetic switch includes two parts the one part is magnet and the other part is switch with wires.
4 1 out of 5 stars 42.
Pair rolling magnetic contact reed nc gate door switch alarm security accessory.
Nc nc means normally closed.
99 speedda 6 sets magnetic reed switch normally open closed nc no door alarm window security magnetic door switch magnetic contact switch reed switch for gps alarm or other device dc 5v 12v 24v light 4 1 out of 5 stars 57.
Concealed concrete switch set.
2x magnetic reed switch normally open closed nc no door alarm window security magnetic door switch magnetic contact switch reed switch to dc 5v 12v 24v light black 4 2 out of 5 stars 15.
When the magnet together the circuit is conductive light on.
Screw or double face tape is applied surface mount contact.
2sets magnetic reed switch normally open closed nc no door alarm window security magnetic door switch magnetic contact switch reed switch for gps alarm or other device dc 5v 12v 24v light.