Electrical activity sensor device for detecting electrical activity and electrical activity monitoring apparatus

摘要

An electrical activity sensor device for monitoring the electrical status of an electrical device, the device comprising: a power cable for supplying power to an electrical device from a power supply network, the power cable being fitted with an in-line switch enabling the electrical device to be switched between electrical power states; wherein: the antenna element is operable to transfer the identification data to the power cable; and the power cable is operable to operate as an antenna when the electrical device is switched on to transmit identification data wirelessly from a sensor device attached to the cable to a reader device.