The demand for and on data centres continue to pose several power, cooling, and performance constraints associated with environmental and economic inefficiency. Sensor Information Systems (SIS) is one of the best practices for addressing these constraints. This study investigates the assimilation of SIS in data centres. Based on the empirical data gathered from five case studies of Australian data centres, the paper evaluates the current state of SIS utilisation. The results indicate that the utilisation and assimilation of SIS in data centres is very limited. A conceptual framework and several theoretical propositions rooted in the TOE model are proposed to explicate the conditions that influence SIS assimilation. A number of factors including perceived SIS complexity, affordability, reliability and compatibility, the infrastructure characteristics, the age and the type of data centres, green IT strategic orientation, managers’ knowledge and expertise of sensor technology, governance and regulatory requirements have been identified as antecedents for the successful SIS assimilation in data centres.