The belt sway switch is used for sensing the swaying of
the conveyor belts due to uneven loading, worn roller
surface etc. the switch is to be mounted in near vicinity
of the conveyor belt with a small clearance between contact
roller and the belt edge to allow normally accepted swaying.
When the swaying exceeds allowable limit, the belt edge would
push the contact roller which in turn would actuate the switch.
When swaying stops the switch would automatically reset under the action of resetting spring.