Performance
  Excess Gain
    Air Environment
    Poorly Reflective Surfaces
      Material Distinction
  Beam Diameter

Geometry
  Line Of Sight
  Object Size
  Proximity To Sensor
    Touch For Detection
    Minimum Distance
    Maximum Distance
  Mounting
    Through Barrier
    Space

Environment
  Temperature
  Power Supply
    Ac
      12VAC
      24VAC
      120VAC-60HZ
      120VAC
      230VAC
    Dc
      12VDC
      24VDC
      11-28VDC

Load
  Current
    Minimum Current
    Maximum Current
  Response Time

Poorly Reflective Surfaces

The effectiveness of proximity photoelectric sensors is limited by the reflectiveness of the objects being detected.

Computations of effective range are based on a 90% reflective, diffused white surface, such as a Kodak white test card. Where less reflective objects are involved, the required excess-gain must be multiplied by a factor indicating how many times less light is reflected.

For example, suppose you are trying to detect a material that reflects 45% of the light shown on it. A 90% reflective test card reflects 90/45 = 2 times as much light in a clean air-environment, so you will have to multiply the minimum excess-gain by 2.

Products

Technology

Other Considerations