{"product_id":"dahua-door-contact-metal-ard312","title":"Dahua Door Contact (Metal) ARD312","description":"\u003cstyle\u003e\n.dahua-product *{\n    font-family: Arial, sans-serif;\n}\n\n.dahua-product{\n    color:#444;\n}\n\n\/* Main Heading *\/\n.dahua-product h2{\n    background:linear-gradient(135deg,#1f1f1f,#383838);\n    color:#fff;\n    padding:14px 20px;\n    border-radius:10px;\n    margin-top:35px;\n    font-size:26px;\n    letter-spacing:0.5px;\n}\n\n\/* Sub Heading *\/\n.dahua-product h3{\n    color:#a94442;\n    margin-bottom:8px;\n}\n\n\/* Paragraph *\/\n.dahua-product p{\n    line-height:1.8;\n    color:#555;\n}\n\n\/* Feature Cards *\/\n.feature-box{\n    background:#fafafa;\n    border-left:5px solid #c96a6a;\n    padding:18px 22px;\n    margin-bottom:18px;\n    border-radius:12px;\n    transition:all .3s ease;\n    box-shadow:0 2px 8px rgba(0,0,0,.06);\n}\n\n.feature-box:hover{\n    transform:translateY(-4px);\n    box-shadow:0 8px 20px rgba(0,0,0,.12);\n}\n\n\/* Specification Table *\/\n.spec-table{\n    width:100%;\n    border-collapse:collapse;\n    margin-top:20px;\n    border-radius:12px;\n    overflow:hidden;\n}\n\n.spec-table th{\n    background:#2c2c2c;\n    color:white;\n    padding:14px;\n    font-weight:600;\n}\n\n.spec-table td{\n    padding:14px;\n    border:1px solid #ececec;\n}\n\n.spec-table tr:nth-child(even){\n    background:#f8f8f8;\n}\n\n.spec-table tr:hover{\n    background:#fff4f4;\n}\n\n\/* List Style *\/\n.dahua-product ul{\n    padding-left:20px;\n}\n\n.dahua-product li{\n    margin-bottom:12px;\n}\n\n\/* Mobile Responsive *\/\n@media(max-width:768px){\n\n.dahua-product h2{\n    font-size:22px;\n    padding:12px 16px;\n}\n\n.feature-box{\n    padding:15px;\n}\n\n.spec-table th,\n.spec-table td{\n    padding:10px;\n    font-size:14px;\n}\n\n}\n\u003c\/style\u003e\n\u003cdiv class=\"dahua-product\"\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eDahua ARD312 Door Contact (Metal)\u003c\/strong\u003e is a wired magnetic contact detector specially designed for metal doors and windows. Using the magnetic component of a reed switch, it reliably detects the opening and closing status of doors or windows and triggers alarms when unauthorized access is detected.\u003c\/p\u003e\n\u003cp\u003eFeaturing a durable metal-plated housing and surface-mount design, the ARD312 offers excellent stability and long-term performance. It operates without requiring a power supply and is suitable for both residential and commercial security applications.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Designed for metal doors and windows\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Operates without an external power supply\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Durable metal-plated construction\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Surface mount installation\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Normally Closed (N.C.) alarm output\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Standard detection gap up to 35 mm\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Supports circuits up to 100 VDC and 500 mA\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Stable and reliable reed switch operation\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Suitable for residential and commercial use\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e✔ Includes spacers, covers and mounting screws\u003c\/div\u003e\n\u003ch2\u003eWhy Choose Dahua ARD312?\u003c\/h2\u003e\n\u003cdiv class=\"feature-box\"\u003e\n\u003ch3\u003eOptimized for Metal Doors\u003c\/h3\u003e\n\u003cp\u003eIts metal-plated structure allows reliable installation on metal door frames and windows where standard plastic contacts may not perform effectively.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e\n\u003ch3\u003eNo Power Required\u003c\/h3\u003e\n\u003cp\u003eThe magnetic reed switch design enables operation without any external power source, simplifying installation and maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e\n\u003ch3\u003eHigh Durability\u003c\/h3\u003e\n\u003cp\u003eThe robust metal housing provides long-lasting performance and enhanced resistance to wear and environmental conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e\n\u003ch3\u003eReliable Alarm Detection\u003c\/h3\u003e\n\u003cp\u003eAccurately detects opening events and provides dependable alarm activation for enhanced security.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e\n\u003ch3\u003eWide Application Range\u003c\/h3\u003e\n\u003cp\u003eIdeal for homes, offices, warehouses, banks, and other commercial facilities requiring secure door monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eMetal Door Contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eARD312\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitch Type\u003c\/td\u003e\n\u003ctd\u003eMagnetic Reed Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm Output\u003c\/td\u003e\n\u003ctd\u003e1 × Normally Closed (N.C.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Voltage\u003c\/td\u003e\n\u003ctd\u003e100 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Current\u003c\/td\u003e\n\u003ctd\u003e500 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetection Gap\u003c\/td\u003e\n\u003ctd\u003e≥ 35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003eSurface Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCasing Material\u003c\/td\u003e\n\u003ctd\u003eMetal Plating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eSilver Grey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-10°C to +55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Humidity\u003c\/td\u003e\n\u003ctd\u003e10%–90% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e50 × 18 × 10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e54 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cdiv class=\"feature-box\"\u003e🏠 Residential Security Systems\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e🏢 Office Buildings\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e🏬 Retail Stores and Shopping Centers\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e🏭 Warehouses and Industrial Facilities\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e🚪 Metal Doors and Windows\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e🏦 Banks and Financial Institutions\u003c\/div\u003e\n\u003cdiv class=\"feature-box\"\u003e🔐 Wired Intrusion Alarm Systems\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Attendance Machine","offers":[{"title":"Default Title","offer_id":55263657361699,"sku":null,"price":768.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/4125\/3411\/files\/ARD312.jpg?v=1781943648","url":"https:\/\/attendancemachine.in\/products\/dahua-door-contact-metal-ard312","provider":"Attendance Machine","version":"1.0","type":"link"}