Abstract
Future cities require complex metrological infrastructures to ensure core city development concepts such as liveability, sustainability and security of supply. Measurement devices are parts of multi-layered systems - from sensor networks up to the embedding and interactions of metrological systems with city society. Research in the field of Systems Metrology accounts for that fact by shifting the focus from single sensors to those interconnected systems, treating questions of data infrastructures, sensor networks, high level metrics and data communication. Research in the context of the PTB Smart Metrology Campus (SMC) is taking these trends into account. We will introduce the concepts and projects of the SMC on different system levels.