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 and Hex-shaped Fibres

Threaded for easy mounting onto brackets and machine equipment.

Cylindrical (Set Screw Installation)

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

Integrated bracket

The sensor is integrated into an L‑shaped bracket, which simplifies installation.

Small Spot/Focused Beam

Small Spot Reflective

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

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

Retro-reflective

Effective for detecting transparent objects. The beam passes through the (transparent) target twice, so light attenuation increases.

Definite-reflective

Definite-reflective

Detects within a fixed range. Reduces background effects and features a space‑saving, thin profile design.

Small space

Flat Bracket Fibres

Flat Bracket Fibres

This thin profile sensor comes with mounting holes for installation where space is limited.

Sleeve

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

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

High-flex

Provides higher flexibility than an electric wire. Resistant to 30 million bends!

Heat Resistant

Heat Resistant

Ideal for use in high temperature applications. Withstands temperatures up to 350°C.

Dedicated application

Area

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

Liquid-level

Accurate liquid level detection sensors are available in transparent tube-mount or immersion type models.

Vacuums

Vacuums

Can be used in vacuum and high temperature environment.

INDEX

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