MC38 Wired Door/Window Sensor — 1 pair, 330mm wire, Magnetic Switch, N.C. Type ( 2025) Key benefits Reliable, tamperresistant contact monitoring for doors and windows in wired home alarm systems. Clear open/close detection using a magnetic switch in Normally Closed (N.C.) configuration for straightforward integration with standard alarm panels. Extended 330mm wire length on each unit gives flexibility for alignment and mounting without repositioning the alarm panel. What this product does for you Detects when a door or window is opened or closed and sends a wired signal to your alarm control panel. Helps reduce false alarms by using an N.C. magnetic contact that changes state only when the magnet and sensor separate. Provides a durable, quality solution for locations that prefer wired security devices over wireless alternatives. Key attributes Model: MC38 Quantity: 1 pair (two sensors) Type: Wired magnetic switch, Normally Closed (N.C.) configuration Wire length: 330mm per sensor (preattached for easier installation and placement) Function: Door and window contact sensor for home alarm systems Condition: 2025 arrival, made to standards Simple features that matter Magnetic switch design for reliable contact detection. N.C. type wiring compatible with alarm systems designed for normally closed contacts. Prewired 330mm leads to simplify installation and allow for minor alignment adjustments without rewiring. Typical use cases Home entry protection: Install on front and back doors to trigger your alarm when doors are opened. Window monitoring: Fit to sliding or casement windows to detect unauthorized opening. Secondary applications: Use on garage service doors, interior access panels, or retail display cases where wired, normally closed contact monitoring is required. Installation notes Designed for wired connection to alarm panels that accept N.C. magnetic contacts. Use the 330mm preattached wires to route to your alarm zone terminals; secure sensor and magnet on aligned surfaces. Position magnet and sensor with recommended gap per your alarm panel instructions to ensure correct operation. Why choose MC38 Simple, proven magnetic contact operation in a normally closed configuration for secure and predictable alarm system behavior. Supplied as a pair for immediate use on two access points. 330mm wire length improves mounting flexibility and reduces the need for additional cabling. Package includes 1 pair of MC38 wired magnetic door/window sensors with 330mm wires (N.C. type) Note: This product is a wired magnetic contact sensor intended for use with compatible home alarm systems that support Normally Closed (N.C.) door/window contacts. Follow your alarm panel's installation guidelines for wiring and placement.