![Adafruit IR Break Beam Sensor - 3mm LEDs [ADA2167]](https://m.media-amazon.com/images/I/41yytLApGKL.jpg)



🚀 Break the beam, not the flow — instant motion detection for the savvy pro.
The Adafruit IR Break Beam Sensor (3mm LEDs) offers a precise, ultra-fast motion detection solution with a 25cm range and sub-2ms response time. Powered by 3.3-5.5V, it integrates effortlessly with popular microcontrollers and smart home systems. Its compact design and powerful open collector output make it ideal for professional-grade security and automation projects.
| ASIN | B01BU6YBWU |
| Antenna Location | Walkway, Terrace, Garden, Sidewalk, Lawn, Driveway, Garage |
| Battery Description | battery not included |
| Best Sellers Rank | #62,245 in Electronics ( See Top 100 in Electronics ) #206 in Motion Detectors (Electronics) |
| Brand | Adafruit |
| Color | Black |
| Compatible Devices | Security Systems, Smart Home Hubs, Lighting Controls |
| Customer Reviews | 4.5 out of 5 stars 119 Reviews |
| Item Weight | 0.01 Ounces |
| Manufacturer | Adafruit |
| Maximum Range | 25 Centimeters |
| Mounting Type | Wall Mount |
| Power Source | Corded Electric |
| UPC | 600346598904 |
D**N
Worked as expected without issue.
Used this for a beam-break project on Raspberry Pi 3B+. Worked as expected. Pretty easy to set up; I used Python for simplicity; ChatGPT was a big help.
B**H
Awesome.
Someone wrote a review about small wires. Not sure what they are talking about. It comes with dupont pins as shown in pic and wires are smallish but are as expected. Everything is good and it works perfect for what I'm doing.
C**K
Works fine so faR
Works well for 1/32 SCALE slot car timing trigger in light bridge at 6" distance with beam being broken in 1/1000s of a second.
A**R
Works as Described
Works as intended. Sensors are simple and easy to control with your favorite microcontroller.
J**O
Works Perfectly
I have ordered these 3 times which says a lot. I am using the to turn a lamp on and off. Sensors are good quality as are the wires.
S**F
I recommend keeping the setting as dark as possible and they ...
I have used these break beam sensors on several builds and they work perfectly. I've primarily used them for interactive games where I needed to know when a player hit a certain section of a course. I recommend keeping the setting as dark as possible and they really have to be lined up almost perfectly. I ordered two and one pair was a little finicky but overall I love working with these things.
L**T
Work well
I used these for a break beam sensor They are packaged nice and work well and have mounting features (m4 screw hole). Note that other lights (sun and lamps) will interfere with the sensor but that is true of most IR sensors.
J**R
Works well in arduino project.
These work great. I am using them to detect when flow of bubbles stop in a clear plastic tube so my arduino code is backwards of the breakbeam norm, it alerts when they see each other, not when the beam is broken. These sensors have great range and work very well.
Trustpilot
5 days ago
1 day ago