The contact sensor is a gadget included in Creatures 3 which is connectable. If it is connected to another agent and it senses that a creature is in contact with it (ETCH), it sends a strong signal to its connected agent. This makes it particularly useful when paired with a gadget that serves creatures, for example the Cheese Machine. The contact sensor can be picked up or hit by creatures. It can be used in a DS-standalone world by downloading the DS Connective Agent Pack.