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- Industrial Sensing Fundamentals – Back to the Basics: NPN vs PNP
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- Photoelectric Basics - Light On or Dark On
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Tag Archives: through-beam sensor
In my last blog, Imagine the Perfect Photoelectric Sensor, I discussed the possibilities of a single part number that could be configured for any of the basic sensing modes: through-beam, retroreflective, background suppression and diffuse. This perfect sensor would also … Continue reading
Through-beam sensors are a true time proven solution to many photoelectric applications. These sensors can detect anything regardless of color, texture or reflectivity, all that needs to happen is the light beam needs to be blocked. Add an optional aperture … Continue reading
Shortly after posting my last blog, Which light is the right light, I had a customer call with a problem in a machining cell. They are using a self-contained through-beam sensor, in the form of a fork sensor, with a red … Continue reading
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.