Fiber Optic Sensor for Through-beam Range

Through-beam fiber optic sensors use separate emitter and receiver heads to detect objects by interrupting a light beam, offering long detection distances, high accuracy, and strong anti-interference performance.How Through-Beam Fiber Optic Sensors WorkA through-beam fiber optic sensor consists of two main components: an emitter that sends a light beam and a receiver that detects the light. Detection occurs when an object passes between the emitter and receiver, interrupting the beam. This configuration allows for longer sensing distances and higher stability compared to reflective or diffuse sensors because the light path is independent and focused .AdvantagesLong detection range: Can detect objects over distances up to 1000 mm or more depending on the model .High accuracy: Capable of detecting small or fast-moving objects with minimal signal loss .Strong anti-interference: Less affected by ambient light or surface reflectivity due to the direct light path .Durability: Sensor heads are often made from stainless steel or nickel-plated copper, providing corrosion resistance and long service life .Flexible installation: Right-angle or straight fiber heads allow integration into tight or restricted spaces .Components and ConfigurationSensor heads: Transmit and receive light; no electronics in the heads, making them suitable for harsh environments .Amplifier: Required to process the signal from the fiber heads; contains the light source and control electronics .Fiber cables: High-transparency plastic or glass fibers ensure low signal loss and flexibility .ApplicationsThrough-beam fiber optic sensors are widely used in factory automation, high-speed production lines, object positioning, and size or shape detection. They are particularly effective for detecting transparent, small, or irregular objects where reflective sensors may fail .Product ExamplesIFM E20827: A through-beam fiber optic sensor suitable for industrial automation with mounting and CAD support .SUCH Right-Angle Sensors: Offer sensing distances up to 1000 mm, durable stainless steel or copper heads, and CE certification for industrial compliance .Keyence FU Series: Includes thrubeam, reflective, and retro-reflective heads, with models optimized for long-distance or high-precision detection . Through-beam fiber optic sensors are ideal for applications requiring reliable detection in challenging environments, long-range sensing, and high-speed object monitoring, making them a versatile choice for modern automation systems.