What Type of Photoelectric Sensor Is Best For Me?

There are many different styles of photoelectric sensors, but really only four basic technologies: through-beam, reflective, diffuse, and background suppression. The chart describes some advantages and disadvantages of each technology. To learn more about AutomationDirect’s photoelectric sensors visits www.AutomationDirect.com/photoelectric.

 

photoelectric sensors types

 

Through-beam

Advantages:

  • Most accurate
  • Longest sensing range
  • Very reliable

Disadvantages:

  • Must install at two points on system: emitter and receiver
  • Costly – must purchase both emitter and receiver

 

Reflective

Advantages:

  • Cost less than through-beam
  • Only slightly less accurate than through-beam
  •  Sensing range better than diffuse
  • Very reliable

Disadvantages:

  • Must install at two points on system: sensor and reflector
  •  Slightly more costly than diffuse
  • Sensing range less than through-beam

 

Diffuse

Advantages:

  • Only install at one point
  •  Cost less than through-beam or reflective

Disadvantages:

  •  Less accurate than through-beam or reflective
  • More setup time involved

 

Background Suppression

Advantages:

  • Effective with reflective
    backgrounds

Disadvantages:

  • Cost more than diffuse, reflective or through-beam
  • Most setup time required

 

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