Magnetic contact sensors can be added to an existing wired alarm systems.
Nc no door window contact magnetic reed switch.
Nc no door window contact magnetic reed switch alarm 3w 10 25mm.
2x abs magnetic door window reed switch contact switch alarm security system.
4 1 out of 5 stars 42.
Weij 10 pair rc 33 nc recessed wired security window door contact sensor alarm.
1 pair magnetic switch includes two parts the one part is magnet and the other part is switch with wires.
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.
Magnetic reed switches are available closed loop open loop spdt dpdt options with standard wide and extra wide gaps.
They are ideal for protecting doors windows and patio doors and any opening device such as a drawer or cupboard for example.
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 4pcs.
Concealed concrete switch set.
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.
Yootop 5 sets recessed wired magnet reed switch window door magnetic contact sensor alarm white 4 7 out of 5 stars 43.
2 pair no nc wired magnetic door window contact reed for alarm system.
When the magnet separate the circuit is not conductive light off great for use in family and factory window door.
Screw or double face tape is applied surface mount contact.
5 pk wired contacts.
Recessed wired security window door contact sensor alarm magnetic reed switch white rc 33 10pcs 4 1 out of 5 stars 42.
Door window nc contact security safety alarm magnetic sensor reed switch sets.
Nc no door window contact magnetic reed home switch alarm 3w 10 20mm.
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.
1 4 super mini switch set.
When the magnet together the circuit is conductive light on.
2sets magnetic reed switch normally open closed nc no door alarm window security product description.
Nc no door window contact magnetic reed switch alarm 3w 10 20mm 4 3 out of 5 stars 63 8 99 8.
Overhead door magnetic switch sets.
Nc nc means normally closed.
4 2 out of 5 stars 105.
Recessed wired security window door contact sensor alarm magnetic reed switch white rc 33 10pcs.