Tag Archives: retroreflective

Imagine the Perfect Photoelectric Sensor

Photoelectric sensors have been around for a long time and have made huge advancements in technology since the 1970’s.  We have gone from incandescent bulbs to modulated LED’s in red light, infrared and laser outputs.  Today we have multiple sensing … Continue reading

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Photoelectric Output Operate Modes and Output Types

Photoelectric sensors are used in a wide variety of applications that you encounter every day. They are offered in numerous housing styles that provide long distance non-contact detection of many different types of objects or targets. Being used in such … Continue reading

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Photoelectric Basics – Light On or Dark On

Recently I was asked if light on and dark on for a photoelectric sensor was the same as normally open and normally closed.  The short answer is yes, but I think it justifies more of an explanation.  In the world … Continue reading

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Choose The Flavor Of Photo Eye: Light-On Or Dark-On?

Sometimes the things that always seem the simplest can really be the most confusing. In the world of the Photo sensor, the principle of “light-on” vs. “dark-on” is won of those things. So what am I talking about you may say? Well let’s look at both and see if I can help define these concepts.
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Getting Retroreflective with Photoelectric Sensors

The most popular photoelectric sensor used is the retro-reflective or reflex mode sensor. One of the advantages of the retroreflective style photoelectric sensors is the light emitter, or light source, and the receiver are in the same enclosure, thus you only have a single device to mount and wire making installation easier and faster. The output of the sensor changes state when the object blocks the light beam between the sensor and the reflector. Continue reading

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