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Pepperl+Fuchs Blog

The Swiss Army Knife of Photoelectric Sensors

Posted by Hunter Cain on Fri, Jun 24, 2016

When automation applications call for noncontact object detection, photoelectric sensors offer many solutions.

What all photoelectric sensors share is that they are compact devices which provide a high level of reliability and precision when it comes to object detection. They are ideal tools for applications where you need reliable, precise object detection in the smallest space possible.

There is quite a variety of photoelectric sensors available and many different sensing modes. Below is a closer look at several photoelectric sensing modes and how they can benefit you if you’re considering them for an application.

  1. Diffuse mode is where light from the emitter strikes the target, causing the light to become diffused at arbitrary angles. Some light returns directly to the receiver and the target is detected.
  2. Background suppression mode has a defined sensing range for any object regardless of color, reflectivity, or finish. It is able to detect dark objects on shiny backgrounds.
  3. Background evaluation mode only evaluates the light reflected by the background. It is useful in applications with odd-shaped targets.
  4. Retroreflective mode has a reflector that reflects light back to its source with minimum scattering.
  5. Clear-object retroreflective mode utilizes a low-hysteresis circuit to detect small changes in light when sensing clear objects.
  6. Thru-beam mode utilizes two separate sensors aimed at each other, where one acts as an emitter and the other acts as a receiver. This mode allows the longest possible sensing range for photoelectric sensors.
  7. Quasi-measuring mode includes two independent outputs, so the output can turn on and stay on throughout a specified range.
  8. Measuring mode performs a measurement to an object within a certain distance.

With so many sensing modes available, the R100 series provides a new approach to giving you what you need to solve sensing problems. It helps take the guesswork out of choosing the correct photoelectric sensor. The R100 is available in all eight sensing modes with different corresponding model numbers depending on your application, while keeping the same compact housing—just like the versatile Swiss Army knife.

A few more features that make these photoelectric sensors so versatile are:

  • Easy-to-use potentiometer with multiturn capability that prevents the potentiometer from being stripped out
  • High degree of protection—IP69K
  • IO-Link capabilities
I Want to Know More   About the R100 Series!

 

Topics: Photoelectric Sensors

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