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MLV41-8-HV Sensors from Pepperl+Fuchs

By Design World Staff | May 16, 2011

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Pepperl+Fuchs introduces MLV41-8-HV Photoelectric Sensors.  The MLV41-8-HV features advanced optics that identifies paper dust build-up, forgiving mounting tolerances to accommodate imperfect sensor and paper alignment, and a robust metal housing that is immune to acids and alkalis.  It also features integral foreground and background suppression functionality that optimizes detection of web breaks.  The result is consistent, highly reliable web-break detection of various colored papers, reflective or glossy materials, adhesive films, and packaging media in printing, paper and converting applications.

MLV41-8-HV Photoelectric Sensors

“In printing, paper and converting markets, it is very important for web, and to some extent sheet-fed, printing machines to ensure that the web has not torn or broken.  And when a web does tear or break, users need to be able to immediately identify and stop the web flow to minimize the amount of scrapped paper or other web material, and wasted ink,” says Jeff Allison, Product Manager.  “When users can immediately identify a break, downtime is absolutely minimized because the web can be spliced together so that it doesn’t have to be fed through the machine again.  If the web break is not immediately identified users have to thread the web of paper through the entire machine again, at no small time and labor cost.

One of the most significant features of the MLV41-8-HV web-break sensor is that it has integral foreground suppression and background suppression functionality.  For the user, this promises highly consistent web break detection because it senses the web only where it should be, and not when it breaks and falls on the sensor face.  Background suppression further benefits the user by enabling the sensor to detect multiple colors consistently, to within one percent of the same distance.  Unlike competitive solutions that have difficulty seeing dark or matte finishes, variations in web color do not compromise MLV41-8-HV sensor performance.

The MLV41-8-HV has a patented, integral secondary optics system that detects the build-up of paper dust on the sensor face, so that the lens can be cleaned before it compromises sensor performance.  Without this unique function, dust could accumulate on the sensor face, especially when facing upward, and keep the sensor latched ON, falsely indicating that the paper web is present even if it broke.

The MLV41-8-HV sensor features a durable metal housing with a top coated surface of DELTA®-SEAL that is highly resistant to the acids and alkalis commonly used for cleaning and leaching in printing and paper environments.  And forgiving mounting tolerances means that the sensor continues to operate properly, even where the inclination angle of the sensor to the web varies by up to +/- 20 degrees. 

The MLV41-8-HV sensor features Pepperl+Fuchs’ exclusive 4-in-1 output, which saves inventory and set-up costs because one sensor model automatically detects the connected load and selects the appropriate output type.  The sensor is tamper-proof with a fixed sensing range, is highly immune to ambient light and cross-talk.

Pepperl+Fuchs is a world leader in the design, manufacture and application of high quality factory and process automation products and services.  Pepperl+Fuchs pioneered the development of proximity sensors 50 years ago, and has set the standard for innovation and quality ever since.

Pepperl+Fuchs
www.pepperl-fuchs.com

::Design World::


Filed Under: Electronics • electrical, Sensors (position + other), Test + measurement • test equipment

 

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