{"id":52650,"date":"2017-04-10T23:25:09","date_gmt":"2017-04-10T22:25:09","guid":{"rendered":"https:\/\/www.microplanet.ma\/?post_type=product&#038;p=52650"},"modified":"2026-10-19T16:36:37","modified_gmt":"2026-10-19T16:36:37","slug":"reed-magnetic-sensor","status":"publish","type":"product","link":"https:\/\/www.microplanet.ma\/en\/produit\/reed-magnetic-sensor\/","title":{"rendered":"Reed Magnetic Sensor"},"content":{"rendered":"<h2>Reed Magnetic Sensor<\/h2>\n<p>A reed magnetic sensor is a switch sensitive to magnetic fields. It consists of two metal contacts sealed inside an airtight glass tube. When a magnet approaches, the contacts close and allow current to flow. It is commonly used for proximity detection and security applications.<\/p>\n<h4>Detailed specifications<\/h4>\n<ul>\n<li><strong>Operating voltage:<\/strong> 3.3\u20135 V DC<\/li>\n<li><strong>Output:<\/strong> Digital (open\/closed circuit)<\/li>\n<li><strong>Dimensions:<\/strong> Vary by model; generally small and compact<\/li>\n<li><strong>Main component:<\/strong> Reed switch sealed inside an airtight glass tube<\/li>\n<\/ul>\n<h4>How it works<\/h4>\n<p>The reed sensor uses a switch sealed inside a glass tube. In the presence of a magnetic field, the internal contacts close, creating a closed circuit that a microcontroller can read as a digital output.<\/p>\n<h4>Applications<\/h4>\n<ul>\n<li>Security and alarm systems<\/li>\n<li>Proximity detection for doors and windows<\/li>\n<li>Liquid-level sensors<\/li>\n<li>Contactless-control projects<\/li>\n<li>Interactive art installations<\/li>\n<\/ul>\n<h4>Pinout<\/h4>\n<p>A typical reed sensor has two leads (contacts) and no designated pins:<\/p>\n<ol>\n<li><strong>Lead 1:<\/strong> Connect to a power supply or microcontroller input<\/li>\n<li><strong>Lead 2:<\/strong> Connect to ground or a microcontroller output<\/li>\n<\/ol>\n<h4>How to use it<\/h4>\n<p>Connect the two leads of the reed sensor as follows:<\/p>\n<ol>\n<li><strong>Lead 1<\/strong> to 5 V or an Arduino digital input<\/li>\n<li><strong>Lead 2<\/strong> to GND or an Arduino digital output<\/li>\n<\/ol>\n<h4>Using it with an Arduino Uno<\/h4>\n<h5>Basic Arduino code example<\/h5>\n<div>\n<div class=\"hcb_wrap\">\n<pre class=\"prism undefined-numbers lang-cpp\" data-lang=\"C++\"><code>const int led = 13; \/\/ LED sur l'Arduino\r\nconst int reedPin = 3; \/\/ Interface num\u00e9rique du capteur Reed\r\nint reedState; \/\/ Etat du capteur Reed\r\n\r\n\r\nvoid setup() {\r\n\u00a0 pinMode(led, OUTPUT);\r\n\u00a0 pinMode(reedPin, INPUT);\r\n\u00a0 Serial.begin(9600);\r\n}\r\n\r\n\r\nvoid loop() {\r\n\u00a0 \/\/ Lecture de l'\u00e9tat du capteur Reed\r\n\u00a0 reedState = digitalRead(reedPin);\r\n\u00a0 if (reedState == HIGH) {\r\n\u00a0 \u00a0 digitalWrite(led, HIGH);\r\n\u00a0 \u00a0 Serial.println(\"Magnet detected\");\r\n\u00a0 } else {\r\n\u00a0 \u00a0 digitalWrite(led, LOW);\r\n\u00a0 \u00a0 Serial.println(\"No magnet\");\r\n\u00a0 }\r\n\u00a0 delay(100);\r\n}<\/code><\/pre>\n<\/div>\n<\/div>\n<p><strong>What the code does:<\/strong> It reads the reed sensor\u2019s digital value, turns on the Arduino LED when a magnetic field is detected, and displays the status in the serial monitor.<\/p>\n<h5>Components required for the basic example<\/h5>\n<ul>\n<li>Arduino Uno<\/li>\n<li>Reed magnetic sensor<\/li>\n<li>Connecting wires<\/li>\n<\/ul>\n<h5>Basic code explained<\/h5>\n<ol>\n<li><strong>Pin initialization:<\/strong> The LED pin is set as an output and the sensor pin as an input.<\/li>\n<li><strong>Reading and displaying data:<\/strong> The sensor\u2019s digital value is read and displayed in the serial monitor. The LED turns on when a magnetic field is detected.<\/li>\n<\/ol>\n<h5>Basic wiring<\/h5>\n<ul>\n<li><strong>Lead 1 (sensor):<\/strong> D3 (Arduino)<\/li>\n<li><strong>Lead 2 (sensor):<\/strong> GND (Arduino)<\/li>\n<\/ul>\n<p><span style=\"font-size: 8pt\">Keywords: switch, magnetic, sensor, reed switch, magnetic detection, Arduino, proximity, security.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This reed sensor detects magnetic fields. When a magnet approaches, its sealed glass contacts close and allow current to flow, making it useful for proximity and security applications.<\/p>\n","protected":false},"featured_media":52651,"template":"","meta":[],"product_brand":[],"product_cat":[314,316],"product_tag":[],"class_list":["post-52650","product","type-product","status-publish","has-post-thumbnail","product_cat-developpement-en","product_cat-modules-capteurs-en","first","instock","sale","taxable","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Reed Magnetic Sensor | MicroPlanet<\/title>\n<meta name=\"description\" content=\"Magnetic reed sensor with sealed glass contacts for proximity detection, security and Arduino projects.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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