Fresnel Lens for BM612 PIR Sensor - 9mm Diameter
Fresnel Lens for BM612 PIR Sensor – 9mm Diameter
This 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.
Key Specifications
| Specification | Value |
|---|---|
| Compatibility | BM612 PIR sensor module |
| Material | High-Density Polyethylene (HDPE) |
| Wavelength Range | 5 – 14 µm (IR) |
| Diameter | 9 mm |
| Focal Length | ~10 mm |
| Thickness | 0.5 mm (edge) |
What You Can Build With This
- Motion-activated security lights for home or office
- Automatic door openers and presence-based triggers
- Wildlife cameras and animal detection systems
- Energy-saving occupancy sensors for classrooms
Compatibility
This 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.
Wiring Notes
The 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.
Why Buy from Compoden
Every 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.
Is this compatible with HC-SR501 PIR modules?
The 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.
What is the typical detection range after installing this lens?
With optimal positioning, detection range can extend up to 5-7 meters, depending on the sensor's sensitivity settings.
Does the lens come with adhesive for mounting?
No, the lens is press-fit over the sensor dome. It holds securely without adhesive under normal conditions.
📦 Free Setup Handoff Document Included
Every 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.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items