You have both types of contacts on the one unit, so you will always have the correct one! Normally Open (N.O.) and Normally Closed (N.C.) per pair. Contact operation: Contacts are closed cicuit when the magnet is alongside the switch. For alarm installation this is denoted as the "normal" state as the door/window is secure and the alarm is armed.
| category_l3 | Key |
| category_map_id | 806 |
| price_exc | 9.95 |
| in_stock | 1 |
| lead_note | Available |
| source_updated_at_snapshot | 2026-10-26T00:00:39.155570 |
