5 Sets Magnetic Contacts Wired Window Door Contact Sensor Magnetic Reed Switch NC Surface Mounted Alarm Switch Sensor

Description

Product Overview

The WESUA 5‑set magnetic contact sensor is engineered to deliver dependable NC (normally closed) reed switching for a wide range of security and automation applications. Each unit consists of a high‑quality reed tube switch paired with a strong neodymium magnet, creating a reliable magnetic field that keeps the circuit closed when the door or window is properly aligned. Once the magnet separates beyond a 20 mm gap, the circuit opens, instantly signaling a breach. Constructed from corrosion‑resistant materials, the sensors are compact—measuring just 2.5 × 0.5 × 0.5 inches—and lightweight at only 5 oz, making them easy to mount on both industrial panels and residential frames. The package includes all necessary mounting screws, eliminating the need for additional hardware. With a part number WE‑MC‑32, these sensors are designed for straightforward integration into existing alarm systems without the requirement for external power sources or batteries, simplifying maintenance and reducing long‑term costs. Their robust design tolerates temperature fluctuations and humidity, ensuring consistent operation in demanding environments such as factories, warehouses, and outdoor installations.

Usage

These magnetic contacts are versatile enough to be employed in a variety of settings. In commercial buildings, they can be installed on entry doors, fire exits, and service hatches to provide real‑time alerts to security personnel. Residential users benefit from the discreet form factor, allowing seamless integration into window frames and sliding doors without compromising aesthetic appeal. The sensors are also suitable for industrial equipment enclosures, where they monitor access panels and safety gates, ensuring compliance with occupational safety standards. Because the devices operate without batteries, they are ideal for locations where regular battery replacement would be inconvenient or hazardous. Installation is straightforward: simply align the magnet with the reed switch, secure the components using the supplied screws, and connect the leads to the control panel. The NC configuration means the circuit remains closed (light on) when the magnet is in place, and opens (light off) when the door or window is opened, providing a clear visual or electronic indication of status. This makes the sensors compatible with a broad range of alarm controllers, PLCs, and IoT gateways, enabling remote monitoring and integration into smart home ecosystems.

Why Choose Us

Choosing WESUA means selecting a brand committed to quality, reliability, and customer satisfaction. Our magnetic contacts undergo rigorous testing to meet industry standards, ensuring each unit performs flawlessly under continuous operation. The NC reed switch technology has been refined over years of development, delivering a low‑power, high‑sensitivity solution that minimizes false alarms caused by minor vibrations or electromagnetic interference. We provide comprehensive technical support, including detailed installation guides, wiring diagrams, and responsive after‑sales service to address any questions or concerns. Our products are backed by a warranty that reflects confidence in durability and long‑term performance, giving you peace of mind that your security infrastructure remains protected. Additionally, the modular design of the 5‑set kit allows for scalable deployment—whether you need to secure a single entry point or an entire facility, you can expand the system without compatibility issues. By integrating WESUA sensors, you benefit from a proven solution that balances cost‑effectiveness with premium functionality, making it a preferred choice for engineers, installers, and end‑users alike.

Key Features

• Reliable NC reed switching ensures immediate breach detection for doors and windows.
• Compact surface‑mount design fits discreetly into tight spaces without compromising aesthetics.
• Battery‑free operation reduces maintenance costs and eliminates the risk of power loss.
• Durable construction resists corrosion, temperature extremes, and humidity for long‑term reliability.
• Comprehensive customer support and warranty provide confidence and peace of mind.

FAQ

What does NC mean and how does it affect sensor behavior?

NC stands for “normally closed,” meaning the circuit is closed (conductive) when the magnet is aligned with the reed switch. When the door or window opens and the magnet moves beyond the specified gap, the circuit opens, triggering an alarm or signal.

Can these sensors be used outdoors?

Yes, the sensors are built with corrosion‑resistant materials and can operate in a wide temperature range, making them suitable for outdoor installations such as patio doors, garage windows, and equipment enclosures.

Do I need a separate power source for the sensors?

No external power source or batteries are required. The sensors draw minimal current from the connected control panel, simplifying wiring and reducing ongoing maintenance.

How far can the magnet be from the reed switch before the circuit opens?

The sensor is designed to open the circuit when the gap exceeds 20 mm, providing a clear and reliable indication of an opened door or window.

Is the kit compatible with existing alarm systems?

Absolutely. The sensor’s standard wiring and NC configuration make it compatible with most commercial and residential alarm panels, PLCs, and smart home hubs.