Pepperl+Fuchs has rolled out the MLV41-8-HV photoelectric sensors. The new sensors are built using advanced optics that enables them to sense web-break by overcoming issues such as imperfect alignment of paper and sensor with a tolerance of +/- 20°.
Photelectric Sensor
Other features of the sensor are foreground and background suppression that enhances web-break detection. The various applications of the sensor are web-break detection of coloured paper, glossy or reflective materials, packaging materials, and adhesive films.
The foreground and background suppression feature of the sensor is very effective in providing accurate web-break detection. The background suppression feature specifically equips the user to be able to detect multiple colours that are present inside one Percent of the similar distance. Conventional sensors find it difficult to clearly see dark or matte finishes, but the MLV41-8-HV is able to detect colour variations even in such conditions. The optic system of the sensor is able to detect accumulation of paper dust on the sensor face, which helps in timely clearing of the lens before the dust affects the quality of sensing. The dust accumulation can also lead to false indication of the presence of the paper web in some cases even if it is broken. The sensor is housed in a durable metal casing, which is resistant to alkali and acid that are present in the cleaning liquids used in printing environments. The sensor is capable of providing multiple outputs (4-in-1), which is effective in saving cost incurred in the set-up of additional devices. The sensor exhibits resistance to ambient light and cross talk.
Source: http://www.pepperl-fuchs.com