Detection based on “Light”
Type of Fibre Optic Sensors・Fibre Unit
Classification
Fibre units have many variations. Because the fibre does not house any of the electronic components, there are very few limitations on size and shape. The following is a classification example of KEYENCE’s fibre units (FU Series).
Standard/Simple Mounting
Threaded and Hex-shaped Fibres
Threaded for easy mounting onto brackets and machine equipment.
Cylindrical (Set Screw Installation)
Suitable for installation in locations where space is limited. Installed by drilling a hole and using a set screw.
Integrated bracket
The sensor is integrated into an L‑shaped bracket, which simplifies installation.
Small Spot/Focused Beam
Small Spot Reflective
Great for small object detection. Spot size and focal distance are adjustable, so there is no need to change the distance between the sensor and the target.
Focused Beam/High power
Use of a lens reduces the field of view based on the aperture angle. This narrow beam helps avoid deflection and is suitable for detecting objects at longer distances.
Transparent object detection
Retro-reflective
Effective for detecting transparent objects. The beam passes through the (transparent) target twice, so light attenuation increases.
Definite-reflective
Detects within a fixed range. Reduces background effects and features a space‑saving, thin profile design.
Small space
Flat Bracket Fibres
This thin profile sensor comes with mounting holes for installation where space is limited.
Sleeve
The thin sleeve design eliminates problems caused by limited mounting space and allows the sensor to be placed closer to the target. Lineup includes side‑view and bendable sleeve types.
Environment-proof
Oil/Chemical Resistant
The fluorocarbon resin coating allows these fibres to be used in almost any environment, including oil or chemical‑splash conditions.
High-flex
Provides higher flexibility than an electric wire. Resistant to 30 million bends!
Heat Resistant
Ideal for use in high temperature applications. Withstands temperatures up to 350°C.
Dedicated application
Area
The wide-area beam is ideal for applications where there is variance in target position and for detecting multiple shapes or moving targets.
Liquid-level
Accurate liquid level detection sensors are available in transparent tube-mount or immersion type models.
Vacuums
Can be used in vacuum and high temperature environment.
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Detection based on “Light”
Features and advantages of fibre optic sensor
Fibre Optic Sensors -
Detection based on “Light”
Glossary useful for selecting Fibre Unit
Fibre Optic Sensors
