Three normally open reed switch magnetic sensors with long metal leads for Arduino and ESP32 projects

Normally Open Reed Switch Magnetic Sensor for Arduino, Raspberry Pi & ESP32

SKU AC223

$1.99 USD Shipping & tax calculated at checkout
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Normally open reed switch magnetic sensor for non-contact proximity and position detection; passive digital trigger for doors, lids, end-stops, alarms, robotics, home automation, Arduino, Raspberry Pi, ESP32.

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Overview

Product Overview

A reed switch magnetic sensor is a simple contact-based proximity sensor that detects the presence of a nearby magnet and changes state for reliable position, door, lid, and limit detection. This normally open sensor remains open until a magnetic field brings the internal reed contacts together, making it useful for alarms, home automation, robotics, and DIY prototyping. Use it as a basic digital trigger with Arduino, Raspberry Pi, or ESP32 projects for cabinet monitoring, end-stop sensing, and non-contact movement detection where low-power, passive magnetic switching is preferred.

Questions & answers

Frequently asked questions

Yes, this reed switch magnetic sensor is compatible with Raspberry Pi. It can be easily integrated as a digital input to detect magnetic field presence, making it suitable for a variety of Raspberry Pi projects.
The reed switch magnetic sensor has pre-soldered headers, allowing you to connect it directly to a breadboard or microcontroller pins. It can be used as a simple switch, changing states in response to a magnetic field.
The reed switch magnetic sensor operates at standard logic level voltages compatible with common microcontrollers like Arduino, Raspberry Pi, and ESP32. Always refer to your specific board's specifications for accurate voltage compatibility.
A common use case for this reed switch sensor is in home automation systems for monitoring cabinet doors or windows, where it acts as a discreet, low-power trigger that senses when doors open or close.
First, ensure the sensor is correctly connected to your setup and check the magnetic field's strength and alignment. If problems persist, utilize ShillehTek's 30-day return policy for a replacement or refund.

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What's included

Features & Specs

Normally Open ContactThe reed switch stays open until a nearby magnet closes the internal contacts.

Magnetic Proximity SensingThis contact-based sensor detects magnet presence for simple non-contact position and movement triggering.

Passive Digital OutputThe sensor acts as a basic dry-contact digital trigger for input monitoring and switching.

Project CompatibilityIt works with Arduino, Raspberry Pi, ESP32, and other microcontroller or GPIO-based projects.

Common Use CasesUse it for door, lid, cabinet, alarm, and home automation open-close detection.

Limit And End StopsIt is suitable for robotics limit sensing, end-stop detection, and position feedback applications.

Low Power OperationIts passive magnetic switching design is useful where simple low-power sensing is preferred.

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