Gabrys develops a relational account of sensing in which sensors do not simply record an already existing environment but participate in composing the conditions through which environments become perceptible and computational. The iconic move is to displace the human observer as the privileged centre of experience: sensing is distributed across devices, atmospheres, infrastructures, organisms and data operations. The theoretical contribution lies in joining Simondonian individuation, environmental media and more-than-human geography to describe experience as a transindividual process rather than a possession of isolated subjects. Conceptually, the paper treats sensing as an operative relation: signals, thresholds and technical capacities transform what counts as an environment at the same time that environments shape the capacities of sensors. Its wider bridge is to posthuman geography and media theory, where computation becomes environmental rather than merely screen-based. The result is an ontology of reciprocal formation: sensors experience by participating in environments that are themselves reorganised through sensing.