The MC31 Magnetic Switch is a reliable, compact sensor designed to detect the presence or absence of a magnetic field. Commonly used in security systems, door/window alarms, and automated systems, this switch consists of a reed switch (a magnetic field-sensitive switch) and a magnet. When the magnet is close to the reed switch, the switch is closed, and when the magnet moves away, the switch opens, triggering an electrical signal.

The MC31 Magnetic Switch is an ideal choice for low-voltage applications where a simple open/close signal is needed, such as in home security systems, access control, or automatic door systems.

Key Features:

• Type: Normally open (NO) reed switch

• Compact design: Easy to integrate into tight spaces

• Durable construction: Reliable performance in various environments

• Wide operating temperature: Works well in a variety of temperatures (from -10°C to 50°C)

• Voltage rating: Typically 12V-24V DC (depending on your circuit)

• Applications: Ideal for door/window security systems, automation, and access control

• Wiring: Simple 2-wire connection

• Output: Open/close switch action (digital signal)

How It Works:

The MC31 Magnetic Switch operates on the principle of a reed switch that opens or closes when exposed to a magnetic field. When the magnet is near the reed switch (usually placed in a door or window frame), the reed switch closes, allowing current to pass through and triggering the connected circuit. When the magnet is moved away (e.g., the door or window opens), the reed switch opens, breaking the circuit and signaling that the door/window is open.

Typical Use Cases:

• Home and office security systems: Detecting door/window openings for alarm activation

• Automated doors/windows: Used for triggering open/close actions in automated systems

• Industrial automation: Monitoring machine parts or position detection in manufacturing systems

• DIY projects: Integrating into custom alarm systems or smart home applications

• Access control: Used in locks, gates, or cabinets where magnetic detection is needed

Limitations:

• Limited range: Effective only when the magnet is within a certain proximity to the reed switch

• Magnetic field sensitivity: Can be affected by interference from other magnets or nearby metal objects

• Low current switching: Not suitable for high-power applications or for switching large currents directly

• Physical alignment: Proper alignment between reed switch and magnet is crucial for correct operation