IR Break Beam Sensor (50cm)

An infrared break-beam sensor pair for simple, reliable motion detection. The emitter sends a beam of invisible IR light to the receiver — when an object passes between them and breaks the beam, the receiver outputs a signal. Works up to 50 cm at 5 V with a fast response time under 2 ms.

The compact 20 × 10 × 9 mm modules fit easily into tight spaces. The NPN normally-open output can directly drive a relay (up to 100 mA) or connect to any Arduino or microcontroller GPIO pin.

Key Features

• 50 cm Detection Range – At 5 V (20 cm at 3.3 V)
• Fast Response – Under 2 ms response time
• NPN Normally Open Output – Up to 100 mA, can directly drive a relay
• Compact Size – 20 × 10 × 9 mm per module
• Wide Temperature Range – −25 °C to 60 °C

Specifications

• Detection Distance – 50 cm at 5 V, 20 cm at 3.3 V
• Detection Method – Through-beam (non-transparent objects)
• Working Voltage – DC 3.0–5 V
• Working Current – 25 mA
• Output Mode – NPN normally open
• Output Current – 100 mA max
• Receiving Angle – Under 10°
• Response Time – 2 ms
• Operating Temperature – −25 °C to 60 °C
• Module Dimensions – 20 × 10 × 9 mm
• Cable Length – 25 cm
• Environment – Indoor use (not waterproof)

Wiring

• Transmitter – Red wire → 5 V DC, Black wire → GND
• Receiver – Red wire → 5 V DC, Black wire → GND, White wire → Output (NPN)

Ideal For

• Motion and object detection
• Speed measurement and lap timing
• Counting and inventory systems
• Robotics competitions

Package Contents

• 1× IR break beam receiver
• 1× IR break beam transmitter