DFROBOT IR Break Beam Motion Sensor

The DFROBOT IR Break Beam Motion Sensor (SEN0503) provides a straightforward and effective method for detecting motion, speed, and timing in electronic projects and smart robot competitions. This sensor operates on the principle of an infrared light beam transmitted from an emitter to a receiver; when an object interrupts this invisible beam, a signal is triggered.

Designed for compact integration, the module's small footprint of 20 x 10 x 9 mm allows for convenient installation in narrow spaces. It delivers a fast and stable response time of less than 2 ms, ensuring reliable detection for time-critical applications. Power the sensor with a DC voltage between 3.0V and 5.0V, making it compatible with a wide range of microcontroller platforms, including Arduino.

Key Features & Specifications

• Detection Range: Offers an induction distance of up to 50 cm when powered at 5V, and 20 cm at 3.3V.
• Induction Method: Through-beam type, detecting non-transparent objects that break the IR beam.
• Electrical Specifications: Working current of 25mA with an output current of 100mA, sufficient to directly drive a relay. Output mode is NPN normally open.
• Optical Performance: Emitting angle is a straight line (infrared light) with a receiving angle of less than 10 degrees for precise detection.
• Environmental Ratings: Operates within a temperature range of -25°C to 60°C. Designed for indoor use and is not waterproof.
• Physical Details: Module dimensions are 20 x 10 x 9 mm (L x W x H), with a connected cable length of 25 cm. The light hole diameter is 3 mm.
• Wiring: Transmitter connections are simple: red wire to 5V DC and black wire to GND.

Ideal for prototyping, this sensor is perfect for creating security systems, automated counters, entry/exit detectors, and interactive installations where reliable, non-contact sensing is required.