this is the video of bobbin sensor used for Weft End Detection in Circular loom used in Woven Sack Industry.
We can see the sensor functioning : how it works, and stops loom when one of the bobbin is at near empty condition.
It has also important feature that once a bobbin is at near empty condition or empty, even on repeated attempts to RUN the loom, sensor will stop the loom.
Developed By : Beta Computronics Pvt Ltd
www.betacomp.com