Mini Reed Switch Module — Compact Magnetic Sensor, Digital Output, Arduino Compatible

Mini Reed Switch Module — Compact Magnetic Sensor, Digital Output, Arduino Compatible

This mini reed switch module is the compact version of the standard reed switch module — same magnetically-actuated non-contact detection in a smaller PCB footprint. When a magnet is brought within range, the reed switch closes and the module outputs a digital signal. The smaller size makes it ideal for space-constrained applications where the standard module is too large. Includes 3-pin header for direct Arduino connection.

Module Specifications

• Sensor Type: Reed switch (magnetically actuated)
• Output: Digital (changes state when magnet is present)
• Operating Voltage: 3.3V – 5V DC
• Connector: 3-pin male header (GND, VCC, Signal)
• Form Factor: Mini (smaller PCB than standard reed switch module)

Mini vs Standard Reed Switch Module

• Mini (this listing): Smaller PCB — for space-constrained enclosures and compact projects
• Standard: Larger PCB, may include LED indicator — for general-purpose use
• Both provide the same digital output and magnetic actuation principle

Typical Applications

• Compact door sensor: Detect open/closed state in small enclosures
• Wearable projects: Magnetic clasp detection in wearable electronics
• Liquid level: Float-mounted magnet triggers switch at set level
• Rotation counting: Count shaft rotations with magnet attached

Package Contents

• 1 × Mini reed switch module with 3-pin header

Compact non-contact magnetic detection — mini reed switch module with digital output for space-constrained door sensing, liquid level, and proximity detection projects.

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