Removing a sensor should not erase the meaning of its data
An ageing environmental sensor is taken out of service and replaced. Without clear records, analysts may confuse old and new measurements or lose the history of how the site was monitored. Decommissioning is a managed transition, not merely unplugging equipment.
Confirm the reason and authority
Replacement, obsolescence, relocation or project completion may justify retirement. Record the decision and responsible owner.
Preserve measurement history
Keep relevant identifiers, calibration information, placement details and quality flags according to applicable retention requirements.
Manage the transition
Where appropriate, compare old and replacement instruments to understand potential breaks in the time series.
Update systems and maps
Dashboards, asset registers and maintenance schedules should reflect the device’s retired status.
Protect security and data
Remove access credentials and handle storage or communications components under approved procedures.
Dispose responsibly
Batteries and electronic components may require appropriate environmental handling.
Break-test: a retired sensor continues transmitting
Can the network distinguish its status and prevent obsolete data from appearing as authoritative?
Connected knowledge
See Sensor Asset Lifecycle Management, Maintenance Audit Trails and NEA.