{"product_id":"mc-38a-wired-door-window-magnetic-sensor-reed-switch-nc-no","title":"MC-38A Wired Door Window Magnetic Reed Switch Sensor NC\/NO","description":"\n\u003ch2\u003eMC-38A Wired Door \u0026amp; Window Magnetic Sensor Switch\u003c\/h2\u003e\n\u003cp\u003eKeep your home, office, or commercial property more secure with the \u003cstrong\u003eMC-38A Wired Magnetic Reed Switch Sensor\u003c\/strong\u003e. This compact NC\/NO door and window sensor integrates seamlessly into virtually any wired alarm or security system, triggering a signal the moment a door or window is opened. Made in China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e MC-38A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Durable Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Withstand Voltage:\u003c\/strong\u003e 60V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoad Current:\u003c\/strong\u003e 150 mA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 27 × 14 × 8 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActuating Distance:\u003c\/strong\u003e 18 mm ± 10 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire Length:\u003c\/strong\u003e 24 AWG, approx. 350 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Output:\u003c\/strong\u003e Normally Open (NO) — closes when a magnet is near; Normally Closed (NC) — opens when a magnet approaches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Surface-mount via screws or double-sided tape\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Contents:\u003c\/strong\u003e 1 complete set (sensor + magnet)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose the MC-38A Magnetic Reed Switch?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Easy to Install:\u003c\/strong\u003e Small form factor fits discreetly on doors and windows without intrusive wiring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable \u0026amp; Long-Lasting:\u003c\/strong\u003e Stable performance over a long service life with consistent switching action.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTough Construction:\u003c\/strong\u003e Resistant to pressure, impact, and corrosion — built to handle everyday use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Output Modes:\u003c\/strong\u003e Supports both Normally Open (NO) and Normally Closed (NC) configurations for flexible wiring in any alarm system.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Ideal for homes, hotels, shopping centres, warehouses, hospitals, and more — works with wooden doors, metal doors, and windows.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThe MC-38A uses a reed switch mechanism combined with a permanent magnet. When the door or window is \u003cstrong\u003eclosed\u003c\/strong\u003e, the magnet keeps the reed switch in its resting state. When the door or window is \u003cstrong\u003eopened\u003c\/strong\u003e, the magnet moves away, causing the reed switch to change state and send a signal to your alarm controller. This simple yet effective detection method makes it a staple in wired security installations worldwide.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eThe sensor can be mounted with the included screws or double-sided tape on most door and window frames. Align the sensor body with the magnet piece so they are within the 18 mm actuating distance when the door or window is fully closed. Due to manual measurement, a ±5 mm deviation may exist. Slight colour differences from product images may occur due to lighting conditions.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-2-pin-quick-splice-spring-wire-connectors-lock-terminals\"\u003e10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1000d-tactical-edc-bag-military-ammo-pouch-hunting-wash-bag-dump-pouch-portable-tool-storage-handbag-compatible-military-utility\"\u003e1000D Tactical EDC Bag – Military Utility Tool Storage\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws – Phillips Wood Hinge\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between a Normally Open (NO) and Normally Closed (NC) magnetic reed switch?\u003c\/h4\u003e\n\u003cp\u003eA: A \u003cstrong\u003eNormally Open (NO)\u003c\/strong\u003e reed switch stays open (no circuit) when no magnet is present, and closes (completes the circuit) when a magnet comes near. A \u003cstrong\u003eNormally Closed (NC)\u003c\/strong\u003e reed switch stays closed (circuit complete) when no magnet is present, and opens (breaks the circuit) when a magnet approaches. Choose the type that matches your alarm system's wiring requirements.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What surfaces can the MC-38A magnetic sensor be installed on?\u003c\/h4\u003e\n\u003cp\u003eA: The MC-38A is suitable for wooden doors, glass windows, metal-framed doors, and most standard door and window types. It can be mounted using screws for a permanent installation or double-sided tape for a non-invasive, easy-to-remove setup.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the MC-38A compatible with most wired home alarm systems?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The MC-38A operates at low voltage (up to 60V DC, 150 mA), making it compatible with the vast majority of wired home and commercial security alarm panels. Simply connect the two wires to your alarm system's zone input terminals.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How close does the magnet need to be for the sensor to trigger?\u003c\/h4\u003e\n\u003cp\u003eA: The actuating distance is approximately 18 mm (± 10 mm). For reliable detection, ensure the sensor body and the magnet piece are installed within this range when the door or window is in the closed position.\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 is the difference between a Normally Open (NO) and Normally Closed (NC) magnetic reed switch?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A Normally Open (NO) reed switch stays open (no circuit) when no magnet is present, and closes (completes the circuit) when a magnet comes near. A Normally Closed (NC) reed switch stays closed (circuit complete) when no magnet is present, and opens (breaks the circuit) when a magnet approaches. 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Simply connect the two wires to your alarm system's zone input terminals.\"}}, {\"@type\": \"Question\", \"name\": \"How close does the magnet need to be for the sensor to trigger?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The actuating distance is approximately 18 mm (± 10 mm). For reliable detection, ensure the sensor body and the magnet piece are installed within this range when the door or window is in the closed position.\"}}]}\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:\/\/68k0rh-yt.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"MC-38A Wired Door Window Magnetic Reed Switch Sensor NC\/NO\", \"item\": \"https:\/\/68k0rh-yt.myshopify.com\/products\/mc-38a-wired-door-window-magnetic-sensor-reed-switch-nc-no\"}]}\u003c\/script\u003e","brand":"Richie's","offers":[{"title":"A2 Normally open","offer_id":57574183272614,"sku":"1005012730821516-A2 Normally open","price":18.95,"currency_code":"USD","in_stock":true},{"title":"A1 Normally closed","offer_id":57574183305382,"sku":"1005012730821516-A1 Normally closed","price":13.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/2182\/7494\/files\/S0d7aa685db9f49768237644c06e2f1acL_ba6e1234-67ec-48d0-9dae-e457be65cb79.webp?v=1791240836","url":"https:\/\/richiesmart.com\/products\/mc-38a-wired-door-window-magnetic-sensor-reed-switch-nc-no","provider":"Richie's","version":"1.0","type":"link"}