Through-beam amplifier fiber optic sensor

Through-beam fiber optic sensors detect objects by transmitting light from a sender to a receiver, with amplifiers processing the signal for precise detection in industrial environments.

Overview

Through-beam fiber optic sensors consist of two main components: a sensor head (emitter and receiver) and a fiber optic amplifier. The emitter sends a light beam across a sensing area to the receiver. When an object interrupts the beam, the receiver detects the change in light intensity, and the amplifier processes this signal to trigger an output or alert . This configuration allows for high-precision detection, even for very small objects or in challenging environments.

Components

• Sensor Heads: These are the fiber optic cables that transmit and receive light. They contain no electronics, making them suitable for tight spaces, high temperatures, or harsh conditions . Through-beam heads are available in various sizes and materials, including stainless steel for durability .
• Amplifiers: The amplifier contains the light source and the processing electronics. It interprets the received light signal, adjusts sensitivity, and provides outputs compatible with industrial control systems. Amplifiers can be analog or digital, and many support multi-point detection and real-time adjustments .

Key Features

• Sensing Distance: Through-beam sensors can detect objects over long distances, with some models reaching up to 2300 mm .
• Detection Precision: High-resolution sensors can detect objects as small as 0.04 mm, making them suitable for micro-level inspections .
• Environmental Resistance: Many sensors are IP67-rated, waterproof, and resistant to physical damage, allowing use in industrial automation, food processing, and automotive production .
• Integration: Sensors are compatible with standard fiber optic amplifiers, simplifying integration into existing systems . Amplifiers often feature OLED displays for easy setup and status monitoring .

Applications

Through-beam fiber optic sensors are widely used in:

• Electronics manufacturing for detecting small components
• Packaging inspection to ensure product presence or alignment
• Automotive production for assembly line monitoring
• Food and pharmaceutical processing for quality control

Advantages

• High reliability in harsh or confined environments
• Fast response times suitable for high-speed production lines
• Flexible installation with front or side detection options
• Minimal wiring due to the separation of sensor heads and amplifiers

Example Products

• Omron E32-TC200: Threaded through-beam sensor with a sensing distance of 2300 mm and IP67 protection .
• ifm E20827: Fiber optic through-beam sensor compatible with standard amplifiers for industrial automation .
• GTRIC Array Fiber Optic Sensor: Offers multi-point detection, high precision, and robust stainless steel construction for harsh environments . Through-beam fiber optic sensors combined with amplifiers provide precise, reliable, and flexible detection solutions for a wide range of industrial applications, particularly where space constraints or environmental challenges make conventional sensors impractical .