Pepperl+Fuchs Blog

Tom Corbett

Recent Posts

How Are Photoelectric Fork Sensors Different from Normal Thru-Beam Sensors?

Posted by Tom Corbett on Fri, Aug 26, 2016

Fork sensors—when one housing is better than two

Fork sensors, also called fork type sensors or slot sensors, have a unique U shape similar to that of a tuning fork. But don’t be fooled by their name or shape—these are photoelectric sensors that work with light rather than sound. A photoelectric fork sensor is a type of thru-beam sensor with an emitter and receiver facing each other. But instead of the emitter and receiver existing apart from one another as two separate sensors, they are both contained together in the same housing. This one-piece design aligns the optical axis, and with the emitter and receiver perfectly aligned, you get higher switching speeds and better reliability. Finally, since this housing needs only one electrical connection instead of two, the sensor is simpler to install and more cost-effective.

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Smaller Can Be Better with Fiber Optic Sensors

Posted by Tom Corbett on Fri, Jan 30, 2015

Fiber optic sensors sometimes get a bad reputation because of their small size or oddly shaped sensing tips. But, actually, it’s their size and shape that give them unique advantages over typical photoelectric sensors.

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Topics: Photoelectric Sensors

Sensing Clear Objects with Photoelectric Sensors

Posted by Tom Corbett on Mon, Mar 03, 2014

Sensing or counting clear objects using a standard photoelectric sensor can be difficult.  That’s because standard photoelectric sensors are not sensitive enough to detect the small attenuations in light that clear objects cause.  To accurately sense glass or plastic bottles, clear packaging, or even transparent films, Pepperl+Fuchs offers special wide-beam diffuse sensors and also advanced retroreflective models, designed specifically for sensing clear objects.

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Topics: Applications, Photoelectric Sensors

Photoelectric Sensors Use Time-of-Flight Measurement

Posted by Tom Corbett on Tue, Feb 04, 2014

Not just distance measurement, but customized detection!

You may already know that pulse ranging technology (PRT) is Pepperl+Fuchs’ advanced time-of-flight measurement used in photoelectric sensors like the popular VDM28 distance sensor. PRT provides continuous measurement of a target’s distance by using the speed of light as a constant, sending out extremely short but very powerful pulses of light, and calculating the duration between the time a pulse is sent and the time it is received.

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Topics: Photoelectric Sensors, Distance Sensors

Machine Safeguarding with Safety Edges

Posted by Tom Corbett on Thu, Aug 22, 2013

Unique photoelectric sensors for edge monitoring

Moving machine parts, closing edges of doors and gates, and even automated guided vehicles (AGV) all have the potential to cause workplace injuries. Health and Safety regulations require that workers be protected from preventable injuries. But without the proper protection in place, worker safety can be at risk. One way to provide this protection is by machine safeguarding.

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Topics: Light Grids, Photoelectric Sensors

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