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Normally closed magnetic door switch. Black 4 plated plunger normally open. 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 9 99 9. No normally open means that the internal switch is open when the magnetic module is against the switch module door is closed. 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 4 2 out of 5 stars 119.
Nc switches are the opposite. Adds alarming for intrusion or unauthorized entry to your monitored conditions. Put another way if you have a meter capable of displaying when it sees a closed circuit short or an open circuit and you attach the meter to the wires or screw terminals for the contact with the magnet next to the contact the normal position if you read an open then the device is normally open and if you read a short then the device is normally closed. Round magnetic normally open.
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 white 4 1 out of 5 stars 8 8 99 8. Can be mounted to any door or window to detect an opening or closing event. 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 9 99 9. The internal switch is closed when the magnet is against the switch.
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 white 4 3 out of 5 stars 11 8 99 8. An accessory for any sensaphone remote monitoring system the magnetic reed switch adds physical security monitoring to your location. All are rated ip67 for protection from washdowns and temporary submersion. They re often used to detect when a door or window opens and can be used with movable machine guards.
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