Signal Proxy

The Signal Proxy component tells a Sensor to detect a different object when the owner of the component is detected. It's useful for example if you have a character with a RigidBody on each of its limbs. Normally this would cause a sensor to detect each limb individually, but you may want to detect the characters root instead. You could put this component on each limb and point it at the root.

This character has RigidBodies on each of its limbs. A sensor has detected each limb as a separate Signal

The same character but now each limb has a SignalProxy component that points to the character's root.