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Optical fiber sensor for through-beam side detection

Through-beam side-sensing fiber optic sensors provide high-precision, non-contact detection of small and irregular objects, requiring a fiber amplifier for stable operation.Overview

Through-beam fiber optic sensors operate by transmitting light from an emitter fiber to a receiver fiber, detecting objects that interrupt the light path. Side-sensing through-beam sensors are specifically designed to detect objects from the side, making them ideal for irregular shapes, label marks, moving parts, or wide-area inspection in industrial automation . These sensors are commonly used in electronics manufacturing, packaging, automotive production, and food or pharmaceutical processing .

Key Features
  • High Detection Accuracy: Capable of detecting very small objects, with some models sensing diameters as small as 0.04 mm and others down to 0.5 mm .
  • Adjustable Light-Emitting Widths: Available in widths ranging from 5 mm to 120 mm, allowing wide-area coverage and uniform light output .
  • Durable Construction: Reinforced soft rubber sleeves or stainless steel sensor heads provide bending resistance, waterproof protection, and long service life .
  • Fast Response: Ultra-fast signal transmission ensures real-time detection, suitable for high-speed production lines .
  • Compatibility: Must be paired with a fiber amplifier for stable signal processing, with support for both conventional and analog output amplifiers .
Advantages of Side-Sensing Through-Beam Design
  • Wide-Area Detection: Side-sensing allows inspection of irregular or moving objects without requiring precise alignment.
  • Non-Contact Measurement: Prevents damage to delicate targets while maintaining sensor integrity.
  • Flexibility: Can be installed in tight or complex environments where traditional sensors may not fit .
Applications
  • Industrial Automation: Part presence detection, counting, and material deviation monitoring.
  • Label and Mark Detection: Ensures accurate positioning and quality control.
  • Micro-Level and Large-Area Inspection: Suitable for both very small components and broader inspection areas .
Considerations
  • Amplifier Requirement: A fiber amplifier is essential for signal stability and consistent performance.
  • Installation Distance: Detection ranges can extend up to 500 mm, depending on the model and light-emitting width .
  • Environmental Resistance: Some models are designed to withstand high temperatures (up to 300°C) and harsh industrial conditions . Through-beam side-sensing fiber optic sensors combine precision, durability, and flexibility, making them a reliable choice for demanding industrial applications where accurate, non-contact detection is critical .
Optical fiber sensor for through-beam side detection

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