{"product_id":"fresnel-lens-for-bm612-pir-sensor-9mm-diameter-0285","title":"Fresnel Lens for BM612 PIR Sensor - 9mm Diameter","description":"\u003ch1\u003eFresnel Lens for BM612 PIR Sensor – 9mm Diameter\u003c\/h1\u003e\n\n\u003cp\u003eThis Fresnel lens is designed to replace or upgrade the lens on a BM612 passive infrared (PIR) sensor module. It focuses infrared radiation onto the sensor, significantly extending detection range and improving sensitivity. With a diameter of 9mm, it fits directly onto the standard BM612 sensor package.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eBM612 PIR sensor module\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e5 – 14 µm (IR)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e~10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.5 mm (edge)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-home-security-motion-sensor-kit-with-esp32\"\u003eMotion-activated security lights for home or office\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eAutomatic door openers and presence-based triggers\u003c\/li\u003e\n  \u003cli\u003eWildlife cameras and animal detection systems\u003c\/li\u003e\n  \u003cli\u003eEnergy-saving occupancy sensors for classrooms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis lens is specifically shaped for the BM612 PIR sensor, commonly found in HC-SR501-style modules. It works with microcontrollers like Arduino Uno, ESP8266, and Raspberry Pi Pico. The sensor operates at 3.3V to 5V DC, outputting a logic-high signal when motion is detected.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eThe lens mounts directly over the sensor element – no wiring is required for the lens itself. For the BM612 module, connect VCC to 5V, GND to ground, and OUT to a digital input pin. Include a 10kΩ pull-up resistor on the output if using long cable runs.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with HC-SR501 PIR modules?\u003c\/summary\u003e\u003cp\u003eThe BM612 is the sensor inside many HC-SR501 modules; this lens fits the sensor directly, not the module casing. Ensure the sensor diameter matches 9mm.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the typical detection range after installing this lens?\u003c\/summary\u003e\u003cp\u003eWith optimal positioning, detection range can extend up to 5-7 meters, depending on the sensor's sensitivity settings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the lens come with adhesive for mounting?\u003c\/summary\u003e\u003cp\u003eNo, the lens is press-fit over the sensor dome. It holds securely without adhesive under normal conditions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444956848493,"sku":"CDN-0285","price":25.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_ceefd11f-72f0-4837-b419-70672215255b.jpg?v=1781512392","url":"https:\/\/compoden.com\/products\/fresnel-lens-for-bm612-pir-sensor-9mm-diameter-0285","provider":"Compoden","version":"1.0","type":"link"}