{"product_id":"strain-gauge-sensor-bf350-3aa-5pcs-2","title":"Strain Gauge Sensor BF350 3AA 5PCS","description":"\u003cdiv class=\"product-copy\"\u003e\n \u003cstyle\u003e\n .product-copy{line-height:1.7;color:#1f2937}\n .product-copy \u003e * + *{margin-top:1rem}\n .product-copy h2{margin:1.4em 0 .6em;color:#111827}\n .product-copy h3{margin:1.1em 0 .5em;color:#111827}\n .product-copy p{margin:0 0 1em}\n .product-copy ul,.product-copy ol{margin:0 0 1.2em 1.2em}\n .product-copy li{margin:.35em 0}\n .product-copy table{width:100%;border-collapse:collapse;margin:1.2em 0}\n .product-copy table th,.product-copy table td{border:1px solid #e5e7eb;padding:.7em .8em;text-align:left;vertical-align:top}\n .product-copy table th{background:#f9fafb;width:32%}\n .faq-list{margin:1.2rem 0 1.4rem}\n .faq{border:1px solid #e5e7eb;border-radius:12px;padding:.85rem 1rem;margin:.6rem 0;background:#fafafa}\n .note{background:#f8fafc;border-left:4px solid #2563eb;padding:.85rem 1rem;border-radius:8px}\n \u003c\/style\u003e\n\n \u003ch2\u003eTurn Weight and Force into Useful Readings\u003c\/h2\u003e\n\n \u003cp\u003eThe \u003cstrong\u003eStrain Gauge Sensor BF350 3AA 5PCS\u003c\/strong\u003e is a rain sensor designed for scales, hopper monitoring, dispensing, and force measurement. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.\u003c\/p\u003e\n\n \u003cp\u003eKey details include \u003cstrong\u003eUsing temperature range:\u003c\/strong\u003e -30--+80; \u003cstrong\u003eSize L x W:\u003c\/strong\u003e 6.9mm x 3.2mm.\u003c\/p\u003e\n\n \u003cdiv class=\"note\"\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e Load cells need a proper amplifier such as an HX711 and solid mechanical mounting. Small twists or uneven force can change the reading.\u003c\/div\u003e\n\n \u003ch3\u003eWhy you’ll love it\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eUseful spec:\u003c\/strong\u003e BF series\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eSensing range:\u003c\/strong\u003e -30--+80\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCompact size:\u003c\/strong\u003e 6.9mm x 3.2mm\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMaker-friendly build:\u003c\/strong\u003e Easy to use in prototypes, classroom projects, and custom electronics\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCommon controller support:\u003c\/strong\u003e Works well with Arduino, ESP32, Raspberry Pi, and similar boards\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eProject-ready sensing:\u003c\/strong\u003e scales, hopper monitoring, dispensing, and force measurement\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eCompare with similar products\u003c\/h3\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eSensor style\u003c\/th\u003e\n\u003cth\u003eStandout\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStrain Gauge Sensor BF350 3AA 5PCS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003erain sensor\u003c\/td\u003e\n\u003ctd\u003eCurrent item\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/weight-load-cell-5kg-straight-bar-2\"\u003eWeight Load Cell 5kg Straight Bar\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eload cell sensor\u003c\/td\u003e\n\u003ctd\u003eweight sensing, pressure sensing\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/weight-load-cell-10kg-straight-bar-2\"\u003eWeight Load Cell 10kg Straight Bar\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eload cell sensor\u003c\/td\u003e\n\u003ctd\u003eweight sensing, pressure sensing\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/weight-load-cell-20kg-straight-bar\"\u003eWeight Load Cell 20kg Straight Bar\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eload cell sensor\u003c\/td\u003e\n\u003ctd\u003eweight sensing, pressure sensing\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003ch3\u003eWhat you can build\u003c\/h3\u003e\n \u003cp\u003eThis sensor is a good fit for digital scales, dosing machines, smart bins, postal scales, and material testing rigs.\u003c\/p\u003e\n\n \u003ch3\u003eStarter bundles\u003c\/h3\u003e\n \u003cp\u003ePair it with an \u003ca href=\"\/search?q=arduino\"\u003eArduino-compatible board\u003c\/a\u003e, \u003ca href=\"\/search?q=esp32\"\u003eESP32\u003c\/a\u003e, or \u003ca href=\"\/search?q=raspberry+pi\"\u003eRaspberry Pi\u003c\/a\u003e, plus a breadboard or jumper wires for quick setup and testing.\u003c\/p\u003e\n\n \u003ch3\u003eRecommended add-ons\u003c\/h3\u003e\n \u003cp\u003eUseful add-ons include an HX711 amplifier, a rigid frame, and mounting hardware, depending on how you plan to power, mount, and log the sensor.\u003c\/p\u003e\n\n \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003ctd\u003eStrain Gauge Sensor BF350 3AA 5PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eThe key technical indexes\u003c\/th\u003e\n\u003ctd\u003eBF series\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eSensitivity coefficient\u003c\/th\u003e\n\u003ctd\u003e2.00-2.20\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eTemperature self compensation coefficient\u003c\/th\u003e\n\u003ctd\u003e9,11,16,23,27\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eUsing temperature range\u003c\/th\u003e\n\u003ctd\u003e-30--+80\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eSize L x W\u003c\/th\u003e\n\u003ctd\u003e6.9mm x 3.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eContrast\u003c\/th\u003e\n\u003ctd\u003e800: 1 (Min) (transmission)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eResistance\u003c\/th\u003e\n\u003ctd\u003e350 ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003cth\u003eStrain limit\u003c\/th\u003e\n\u003ctd\u003e2.0%\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003ch3\u003eWiring \u0026amp; usage notes\u003c\/h3\u003e\n \u003cp\u003eCheck the pin labels on the \u003cstrong\u003eStrain Gauge Sensor BF350 3AA 5PCS\u003c\/strong\u003e and match them to your controller voltage, ground, and signal pins. Keep wiring short and verify the logic level before powering the module. Load cells need a proper amplifier such as an HX711 and solid mechanical mounting. Small twists or uneven force can change the reading.\u003c\/p\u003e\n\n \u003ch3\u003eWhat’s in the box\u003c\/h3\u003e\n \u003cp\u003e1 × Strain Gauge Sensor BF350 3AA 5PCS\u003c\/p\u003e\n\n \u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n \u003cdiv class=\"faq-list\"\u003e\n \u003cdiv class=\"faq\"\u003e\n \u003cstrong\u003eWhat does the Strain Gauge Sensor BF350 3AA 5PCS measure?\u003c\/strong\u003e\n It is designed to measure rain or water presence.\n \u003c\/div\u003e\n \u003cdiv class=\"faq\"\u003e\n \u003cstrong\u003eCan I use it with Arduino, ESP32, or Raspberry Pi?\u003c\/strong\u003e\n Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.\n \u003c\/div\u003e\n \u003cdiv class=\"faq\"\u003e\n \u003cstrong\u003eDo I need extra hardware?\u003c\/strong\u003e\n Often yes. Force and weight sensors are commonly paired with an amplifier or conditioning board before they connect to a microcontroller.\n \u003c\/div\u003e\n \u003cdiv class=\"faq\"\u003e\n \u003cstrong\u003eIs it good for prototyping?\u003c\/strong\u003e\n Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.\n \u003c\/div\u003e\n \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Circuitrocks","offers":[{"title":"Default Title","offer_id":45836694225185,"sku":"2468","price":115.0,"currency_code":"PHP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0777\/1491\/5617\/files\/strain-gauge-sensor-bf350-3aa-5pcs-2-white.jpg?v=1778912138","url":"https:\/\/circuit.rocks\/products\/strain-gauge-sensor-bf350-3aa-5pcs-2","provider":"circuitrocks","version":"1.0","type":"link"}