Photo Interrupter Sensor (OS25B10)

Overview

The Photo Interrupter Sensor (OS25B10) is a compact optical sensor that combines an infrared LED and a phototransistor in a single package. It detects the presence or absence of an object by interrupting the infrared beam, providing a reliable digital signal. This sensor is a fundamental component in robotics, automation, and counting systems, offering precise and repeatable detection in a wide range of applications.

Key Features

• Infrared LED and phototransistor pair for non-contact detection.
• Slot type design (also known as optical interrupter) that allows objects to pass through the gap.
• Fast response time suitable for high-speed counting and positioning.
• Digital output (open-collector) that interfaces easily with microcontrollers.
• Compact and robust package for easy mounting in tight spaces.
• Wide operating voltage compatible with common logic levels.

Technical Specifications

• Model: OS25B10
• Type: Photo Interrupter (Optical Switch)
• Gap Width: 5mm
• Output Type: Phototransistor (open-collector)
• Operating Voltage: 5V DC (typical)
• Forward Current (LED): 20mA (max)
• Collector-Emitter Voltage: 30V (max)
• Response Time: Rise and fall < 10µs
• Operating Temperature: -25°C to +85°C
• Package: Through-hole (DIP)

Applications & Use Cases

• Robotics: Limit switches, end-stop detection, and object presence sensing.
• Position Sensing: Detecting the position of moving parts in printers, CNC machines, and conveyor systems.
• Counting Systems: Counting items on a production line or in vending machines.
• Speed Measurement: Measuring the speed of rotating shafts or wheels using a slotted disc.
• Security Systems: Detecting opening/closing of doors or windows.

What's Included

• 1x Photo Interrupter Sensor (OS25B10)

Compatibility

• Works with all major microcontrollers: Arduino, Raspberry Pi, ESP32, STM32, and others.
• Can be used with digital input pins; no additional components required for basic operation.
• For reliable operation, it is recommended to use a pull-up resistor on the output pin.

MOKWN Recommendation

The OS25B10 is an excellent choice for hobbyists and professionals alike. Its simple interface and reliable performance make it ideal for educational projects and industrial prototyping. Pair it with our range of microcontrollers and breakout boards to quickly integrate optical sensing into your next project. For applications requiring higher precision, consider our line of optical encoders and reflective sensors.