Diagram of battery-free busbar hot-spot monitoring inside a switchgear cabinet: SenseID temperature tags mounted on busbar joints detect a hot spot, are read by a UHF RFID reader, and feed per-joint temperature into asset management (CMMS/SCADA).

Battery-free temperature sensors detect busbar hot spots inside live switchgear — no wires, no batteries. How it works, which protocol to choose, and the business case.