{"product_id":"gps-01-normally-open-reed-switch-magnetic-proximity-sensor-black","title":"GPS-01 Normally Open Reed Switch – 4x18 to 6x30mm | Black","description":"\n\u003ch2\u003eGPS-01 Normally Open Magnetic Reed Switch – Multiple Size Options\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eGPS-01 Black Reed Switch\u003c\/strong\u003e is a compact, high-sensitivity normally open magnetron proximity sensor designed for seamless integration into security systems, automation circuits, door\/window sensors, and DIY electronics projects. Available in multiple sizes — \u003cstrong\u003e4×18mm, 5×25mm, 6×20mm, 6×25mm, and 6×30mm\u003c\/strong\u003e — this switch delivers fast, accurate magnetic field detection in a slim plastic housing.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Size Options:\u003c\/strong\u003e Choose from 4×18mm, 5×25mm, 6×20mm, 6×25mm, or 6×30mm to perfectly fit your installation requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Sensitivity:\u003c\/strong\u003e Quickly and accurately detects magnetic proximity, ensuring a fast and reliable switching response every time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNormally Open (NO) Design:\u003c\/strong\u003e The circuit remains open until a magnet is brought close, making it energy-efficient and easy to integrate into low-voltage control systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Voltage Compatible:\u003c\/strong\u003e Rated for use below 50Vac or 75Vdc, suitable for a wide range of electronic applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Plastic Housing:\u003c\/strong\u003e Lightweight yet sturdy black plastic body built for long-term, reliable performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Installation:\u003c\/strong\u003e Simple two-wire connection for quick setup in new or existing circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e GPS-01\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Normally Open (NO) Reed Switch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAvailable Sizes:\u003c\/strong\u003e 4×18mm \/ 5×25mm \/ 6×20mm \/ 6×25mm \/ 6×30mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e Below 50Vac or 75Vdc\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1 × Reed Switch\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDoor and window security alarms\u003c\/li\u003e\n  \u003cli\u003eHome automation and smart home systems\u003c\/li\u003e\n  \u003cli\u003eDIY electronics and Arduino\/Raspberry Pi projects\u003c\/li\u003e\n  \u003cli\u003eIndustrial and commercial proximity detection\u003c\/li\u003e\n  \u003cli\u003ePosition sensing and relay triggering circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/non-contact-capacitive-water-level-sensor-3v-5v\"\u003eNon-Contact Capacitive Water Level Sensor 3.3V–5V\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/3-wire-180-degree-washing-machine-timer-switch-semi-automatic\"\u003e3-Wire 180° Washing Machine Timer Switch | Semi-Automatic\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/black-waterproof-inline-cord-switch-3a-250v-double-pole\"\u003eBlack Waterproof Inline Cord Switch 3A 250V Double Pole\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to manual measurement, please allow a tolerance of 1–3mm. Colors may vary slightly between devices due to different display settings.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does \"normally open\" mean for a reed switch?\u003c\/h4\u003e\n\u003cp\u003eA: A normally open (NO) reed switch means the electrical circuit is open (no current flows) when no magnet is present. When a magnet is brought close enough to the switch, the internal contacts close, completing the circuit. This design is energy-efficient because power is only consumed when the magnet activates the switch.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Which size GPS-01 reed switch should I choose?\u003c\/h4\u003e\n\u003cp\u003eA: Choose based on the mounting hole or housing size in your device. The 4×18mm is ideal for very compact spaces, while the 6×25mm and 6×30mm options suit larger enclosures. Always verify the bore diameter and depth of your installation point before selecting a size.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the GPS-01 reed switch compatible with Arduino or Raspberry Pi projects?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! Since this reed switch operates below 50Vac or 75Vdc, it is fully compatible with low-voltage microcontroller platforms like Arduino and Raspberry Pi. Simply connect it in series with your signal or GPIO circuit for easy magnetic proximity detection.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does \\\"normally open\\\" mean for a reed switch?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A normally open (NO) reed switch means the electrical circuit is open (no current flows) when no magnet is present. When a magnet is brought close enough to the switch, the internal contacts close, completing the circuit. This design is energy-efficient because power is only consumed when the magnet activates the switch.\"}}, {\"@type\": \"Question\", \"name\": \"Which size GPS-01 reed switch should I choose?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Choose based on the mounting hole or housing size in your device. The 4×18mm is ideal for very compact spaces, while the 6×25mm and 6×30mm options suit larger enclosures. Always verify the bore diameter and depth of your installation point before selecting a size.\"}}, {\"@type\": \"Question\", \"name\": \"Is the GPS-01 reed switch compatible with Arduino or Raspberry Pi projects?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! Since this reed switch operates below 50Vac or 75Vdc, it is fully compatible with low-voltage microcontroller platforms like Arduino and Raspberry Pi. Simply connect it in series with your signal or GPIO circuit for easy magnetic proximity detection.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/akv9zi-87.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/akv9zi-87.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"GPS-01 Normally Open Reed Switch – 4x18 to 6x30mm | Black\", \"item\": \"https:\/\/akv9zi-87.myshopify.com\/products\/gps-01-normally-open-reed-switch-magnetic-proximity-sensor-black\"}]}\u003c\/script\u003e","brand":"PRIMED","offers":[{"title":"6x30MM","offer_id":41455406252096,"sku":"14:771#6x30MM","price":3.11,"currency_code":"USD","in_stock":true},{"title":"6x25MM","offer_id":41455406284864,"sku":"14:193#6x25MM","price":3.53,"currency_code":"USD","in_stock":true},{"title":"6x20MM","offer_id":41455406317632,"sku":"14:173#6x20MM","price":5.74,"currency_code":"USD","in_stock":true},{"title":"5x25MM","offer_id":41455406350400,"sku":"14:365458#5x25MM","price":3.6,"currency_code":"USD","in_stock":true},{"title":"4x18MM","offer_id":41455406383168,"sku":"14:350850#4x18MM","price":3.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0614\/2948\/1536\/files\/Sfaabdd3632f2461788e82c46f9789411E.webp?v=1792766683","url":"https:\/\/primedgoods.com\/products\/gps-01-normally-open-reed-switch-magnetic-proximity-sensor-black","provider":"PRIMED","version":"1.0","type":"link"}