{"product_id":"dh-31-door-contact-no-nc-3-screw-magnetic-sensor","title":"DH-31 Door Contact – NO\/NC 3 Screw Magnetic Sensor","description":"\u003ch2 data-start=\"104\" data-end=\"121\"\u003eKey Features\u003c\/h2\u003e\r\\n\u003cp data-start=\"123\" data-end=\"346\"\u003e• Dual Contact Type – NO \/ NC Output\u003cbr data-start=\"159\" data-end=\"162\"\u003e• 3 Screw Terminal Connection\u003cbr data-start=\"191\" data-end=\"194\"\u003e• Reliable Magnetic Reed Switch\u003cbr data-start=\"225\" data-end=\"228\"\u003e• Durable ABS Plastic Housing\u003cbr data-start=\"257\" data-end=\"260\"\u003e• Surface Mount Easy Installation\u003cbr data-start=\"293\" data-end=\"296\"\u003e• Compatible with Alarm \u0026amp; Access Control Systems\u003c\/p\u003e\n\n\u003cp data-start=\"380\" data-end=\"532\"\u003eThe \u003cstrong data-start=\"384\" data-end=\"422\"\u003eDH-31 NO\/NC Door Contact (3 Screw)\u003c\/strong\u003e is a magnetic sensor designed for security alarm and access control systems to detect door or window opening.\u003c\/p\u003e\r\\n\u003cp data-start=\"534\" data-end=\"761\"\u003eThis model includes \u003cstrong data-start=\"554\" data-end=\"579\"\u003ethree screw terminals\u003c\/strong\u003e, allowing both \u003cstrong data-start=\"595\" data-end=\"642\"\u003eNormally Open (NO) and Normally Closed (NC)\u003c\/strong\u003e configurations from the same sensor. This flexibility makes it suitable for different alarm panel wiring requirements.\u003c\/p\u003e\r\\n\u003cp data-start=\"763\" data-end=\"1216\"\u003eThe device consists of a \u003cstrong data-start=\"788\" data-end=\"825\"\u003emagnetic reed switch and a magnet\u003c\/strong\u003e. When the door is closed, the magnet keeps the sensor in its normal state. When the door opens and the magnet moves away, the contact changes state and sends a signal to the alarm panel. Magnetic door contacts like the MC-31 series are commonly used in wired alarm systems and typically detect door gaps around \u003cstrong data-start=\"1137\" data-end=\"1149\"\u003e15–25 mm\u003c\/strong\u003e depending on installation.\u003c\/p\u003e\r\\n\u003cp data-start=\"1218\" data-end=\"1327\"\u003eIts compact design and durable ABS casing allow installation on wooden, aluminum, or metal doors and windows.\u003c\/p\u003e\r\\n\u003cp\u003eYou can buy this door contact from ZZ Marts, with stores in Karachi and Lahore and delivery across Pakistan.\u003c\/p\u003e","brand":"ZZ Marts","offers":[{"title":"Default Title","offer_id":52827975385400,"sku":"DH-31 NO\/NC","price":550.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1012\/3932\/4984\/files\/White-terminal-blocks-with-silver-screws.png?v=1787211279","url":"https:\/\/zzmarts.com\/products\/dh-31-door-contact-no-nc-3-screw-magnetic-sensor","provider":"ZZ Marts | Zam Zam Traders","version":"1.0","type":"link"}