{"product_id":"5pcs-95db-alarm-high-decibel-buzzer-sfm-27-dc-3-24v-12v-alarm-continuous-beep-buzzers-for-arduino","title":"SFM-27 95 dB Continuous Beep Buzzer, 3 to 24 V, Pack of 5","description":"\u003cp\u003eA panel that has to make itself heard needs a tone, not a tune. This SFM-27 buzzer puts out a continuous beep at 95 dB measured 10 cm away, runs from 3 to 24 V and arrives five to a pack. For alarm boards, timers and Arduino builds that need an audible step.\u003c\/p\u003e\u003ch2\u003eA steady tone for a board that needs one\u003c\/h2\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eHeard over bench noise\u003c\/strong\u003e At 95 dB at 10 cm the tone sits above a workshop fan or a busy kitchen.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eOne part, mixed rails\u003c\/strong\u003e The 3 to 24 V range covers a 5 V board and a 12 V panel alike.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eSteady, not musical\u003c\/strong\u003e It holds one continuous beep while powered, which suits a fault alarm rather than a chime.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eSpares in the drawer\u003c\/strong\u003e Five arrive in the pack, so a build does not stop for one failed buzzer.\u003c\/p\u003e\u003cp style=\"margin:0 0 6px 0\"\u003e✅ \u003cstrong\u003eTwo wires, two holes\u003c\/strong\u003e Leads are fitted and two holes 40 mm apart let the body sit squarely on a panel.\u003c\/p\u003e\u003cp\u003eThe buzzer is a sounder, not a sensor: nothing in it detects movement, smoke or water, and it makes its tone whenever the supply is live. A switch, a timer, a relay or a board output decides when that happens, and the buzzer supplies the sound.\u003c\/p\u003e\u003cp\u003eWiring is two leads and a DC supply between 3 and 24 V, with a rated voltage of 12 V and a maximum draw of 20 mA. The resonant frequency is around 3.1 kHz, which is where the tone comes through most clearly over background noise.\u003c\/p\u003e\u003cp\u003eThe body is 29 mm across and 15 mm tall, with two mounting holes 40 mm apart and 105 mm leads. That spacing is the figure to check against the panel or the enclosure before drilling, and the pack of five covers a set of boards rather than a single build.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTechnical details\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eModel: SFM-27\u003c\/li\u003e\n\u003cli\u003eQuantity: 5 buzzers per pack\u003c\/li\u003e\n\u003cli\u003eRated voltage: 12 V\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 3 to 24 V\u003c\/li\u003e\n\u003cli\u003eCurrent: 20 mA maximum\u003c\/li\u003e\n\u003cli\u003eSound output: 95 dB at 10 cm, minimum\u003c\/li\u003e\n\u003cli\u003eResonant frequency: 3100 Hz, plus or minus 500 Hz\u003c\/li\u003e\n\u003cli\u003eDiameter: 29 mm\u003c\/li\u003e\n\u003cli\u003eHeight: 15 mm\u003c\/li\u003e\n\u003cli\u003eMounting: 2 holes, 40 mm apart; 105 mm leads\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S12070d91f0e846d4ad8e832901ea5eb3y.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S6c7e3e4ed0854e2e82684f14003379ba2.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Se43790c5ef834213ab717df6f7a683ccA.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\u003cp\u003eMatch the supply on your board, then keep the spare buzzers in the parts drawer.\u003c\/p\u003e\u003cp\u003eSee more: \u003ca href=\"https:\/\/spy-shop.com\/collections\/audio-devices\"\u003eexplore more audio and sound components\u003c\/a\u003e\u003c\/p\u003e","brand":"Spy-shop.com","offers":[{"title":"5PCS","offer_id":64123901149514,"sku":"1005007176918925-5PCS","price":22.08,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/5980\/2954\/files\/S12070d91f0e846d4ad8e832901ea5eb3y.webp?v=1793144983","url":"https:\/\/spy-shop.com\/fi\/products\/5pcs-95db-alarm-high-decibel-buzzer-sfm-27-dc-3-24v-12v-alarm-continuous-beep-buzzers-for-arduino","provider":"Spy-shop.com","version":"1.0","type":"link"}