Magnetic Door Window Sensor Reed Switch Alarm Contact

Secure your doors and windows with a compact magnetic door sensor designed for reliable alarm system monitoring.

Reliable opening detection for home security

✅ Know when a door or window opens so your alarm system can respond.

✅ Fit security protection into tight spaces with a compact 27 × 14 × 8 mm design.

✅ Install it quickly on many surfaces using screws or double-sided adhesive tape.

✅ Count on steady everyday performance with a durable polymer housing.

✅ Use it across more entry points, including wooden and non-ferrous doors or windows.

✅ Choose the setup your system needs with normally closed or normally open versions.

The two-part switch and magnet design is made for simple surface-mount installation. It works well for home security alarm systems, door monitoring, and window monitoring.

Its durable, shatter-resistant construction resists compression, impact, and corrosion, helping it perform over time in homes, hotels, hospitals, shopping malls, and warehouses.

Available as MC-38 and MC-38A, this sensor includes NC and NO output options, with action distances of 16 mm ± 8 mm or 18 mm ± 10 mm, depending on version. Each unit uses 24 AWG lead wire with an approximate 350 mm length.

Compact size suits discreet door and window installation.

Two-piece design makes alignment clear and simple.

Coffee brown finish blends with darker frames.

Surface-mount form avoids complex fitting work.

Visible dimensions help you plan placement accurately.

Wired lead supports direct alarm system connection.

Suitable for different door and window types.

Included screws support a secure fixed installation.

Works for doors, windows, and entry monitoring points.

Different model options match varied alarm requirements.

Package includes two contacts for multi-point coverage.

Add dependable opening detection to your security setup today.