It is a well written and presented paper.
Most of the references are missing page numbers. Please follow strict IEEE guidelines. authors are advised to cite and discuss some more recent references.
1. Authors have presented a very good idea of Implementing Energy-efficient Sensors in Data
Centers for Industrial Internet of Things.
2. Please explain the criteria that how the parameters and values used in TABLE I and TABLE II are selected.
3. some figures are directly copy pasted from other sources (cite reference and try to draw the figure in original).
4. Please explain Figure 5 more effectively.