A Photoelectric Sensor is an optical device that detects the presence or absence of objects by using a light transmitter and receiver. It senses changes in light intensity caused by an object passing through or reflecting the beam, enabling contactless detection in automation and safety systems.
- Operating Principle: Uses infrared or visible light for detection
- Types: Through-beam, retro-reflective, and diffuse reflective configurations
- Detection Range: Varies by model, from a few centimetres to several meters
- Output Signal: Typically NPN or PNP transistor outputs, or analog signals
- Response Time: Fast switching for high-speed applications
- Environmental Protection: Often IP65 or higher rated for industrial environments
- Power Supply: Commonly 10-30 V DC
