Magnet Door Sensor Reed Switch

Magnetic Door Sensor (Reed Switch)

The Magnetic Door Sensor (Reed Switch) is a simple and reliable device used to detect the open or closed state of doors and windows. It consists of a reed switch and a matching magnet, which work together to trigger a signal when separated or aligned, making it ideal for security and automation systems.

Key Features

• Reed Switch Mechanism – Magnetic contact-based switching
• Normally Open/Closed Options – Flexible configuration
• No Power Required for Switching – Passive sensor operation
• Compact & Lightweight – Easy to install on doors/windows
• High Reliability – Long life with minimal wear
• Fast Response Time – Instant detection of movement

Applications

• Home Security Systems – Door/window intrusion detection
• Smart Home Automation – Trigger lights, alarms, or notifications
• Industrial Safety Systems – Access monitoring
• Cabinet/Locker Monitoring – Open/close detection
• DIY Electronics Projects – Simple position sensing

Technical Specifications

• Sensor Type: Reed Switch (magnetic contact)
• Operating Voltage: Depends on external circuit (typically up to 30V)
• Switch Type: Normally Open (NO) / Normally Closed (NC)
• Contact Rating: Low current switching (model dependent)
• Operating Distance: ~10–20 mm (varies by magnet strength)
• Mounting Type: Screw / Adhesive
• Cable Length: Model dependent

Product Example

Magnetic Door Sensor Reed Switch (NO Type)
A simple magnetic contact sensor for door and window monitoring systems.

Why Choose Magnetic Door Sensor?

• Simple and cost-effective solution
• No power needed for sensing
• Easy to install and integrate
• Reliable for long-term use
• Compatible with Arduino, ESP32, alarm systems

⚠️ Important Notes

• Ensure proper alignment between magnet and switch
• Not suitable for high-current switching
• Avoid strong mechanical shocks
• Mount securely to prevent false triggers
• Check NO/NC type before use

If you want, I can also provide:

• Wiring with ESP32 / Arduino (very useful for you)
• Home security project using this sensor
• Comparison: reed switch vs hall effect sensor
• Best placement tips for accurate detection