Meander detection is possible when rewinding mesh sheets.
Installing screen fiber units NF-TZ07 on each end of the sheet makes it possible to detect any movement to the left or right. With 32 mm width light screen, the NF-TZ07 also ensures stable detection even with mesh objects.

Use two DSR-800 sensors located on both sides of the film.
The sensor is sensitive enough to detect a slight change in the received light.

Screen fiber cable NF-TS40 can be utilized for web alignment control.
It has 40mm width screen beam and in that area the sensor can detect edge of the film. Fiber sensor amplifier with analog output D2RF-TA can feedback the position of the edge by analog output.