Equip your electronic projects with this 3-piece set of infrared break beam sensor switches, a reliable choice for hobbyists, students, and engineers working on automation, robotics, or security setups. Each compact sensor, sized comes in a durable plastic casing with metal pins that ensure secure connections to breadboards or PCBs. The transmitter-receiver pair works by emitting an infrared beam—when an object breaks the beam, the sensor sends a signal, making it ideal for detecting presence or movement in short-range applications.As a photoelectric switch, it operates on 5V DC, matching the voltage requirements of popular microcontrollers Built-in indicator LEDs let you quickly verify power and detection status, simplifying setup even for beginners. With a detection range of up to 30cm, it's perfect for projects like DIY robot obstacle avoidance, automatic feeders, or cabinet door sensors that don't require long-distance sensing.The sensor's versatility shines in various applications: pair it with wireless modules to create remote switch systems for home automation, or use it as a photocell IR beam device for light-triggered projects. Its small form factor fits into tight spaces, making it suitable for compact appliances or wearable tech prototypes. Whether you're replacing a mechanical switch, adding presence detection to a project, or experimenting with basic electronics, this infrared break beam sensor set offers a straightforward, cost-effective solution.