Detection based on “Light”
Detection method and feature of photoelectric sensors

Detection occurs when the target crosses the optical axis between transmitter and receiver.

• ・Long-detecting distance
• ・Stable detecting position
• ・Opaque objects detectable regardless of shape, colour or material
• ・Powerful beam

Detection occurs when the target crosses the optical axis between sensor head and reflector.

• ・Reflector allows installation in a limited space
• ・Simple wiring
• ・Longer detecting distance than the diffuse-reflective sensor type
• ・Easily-adjustable optical axis
• ・Opaque objects detectable regardless of shape, colour, or material

Detection occurs when the light beam, emitted to the target, is reflected by the target and received.

• ・Space-saving (requires installation of sensor unit only)
• ・Adjustment of optical axis not required
• ・Reflective transparent objects detectable
• ・Colour differentiation possible

Detection occurs when the beam spot, emitted to the target, is reflected by the target and received.

• ・Minute objects detectable
• ・Target markings detectable
• ・Detection possible through narrow openings between machines
• ・Visible beam spot

The transmitting and receiving portions are constructed at an angle, allowing detection within the limited area where the optical axes intersect.

• ・Effect of target background is minimal
• ・Low hysteresis
• ・Slight height differences are detectable
• ・Visible beam spot

Detects the target at a specific distance according to the angle of the reflected light beam.

• ・Unaffected by highly reflective targets or backgrounds
• ・Stable detection of materials with varying reflectance and colour
• ・Highly accurate detection of minute objects
• ・Visible beam spot

When the light beam hits a target, the beam reflects differently according to the Lustre of the target. The sensor detects the difference in Lustre based on how the beam reflects (specular or diffusive).

• ・On-line detection is possible.
• ・Detection is not affected by target colour.
• ・Transparent targets can be detected.