Abstract: An apparatus is disclosed for monitoring usage of multiple electrical devices. The apparatus comprises multiple non-invasive current sensors for sensing current in respective conductors associated with the electrical devices. Such conductors may for example be the electrical power supply leads to the devices. The apparatus further includes multiple analogue to digital conversion functions for digitizing the output from the respective current sensors. A microprocessor is arranged to receive the digitized current sensor and is programmed to create usage data relating to the respective electrical devices. Such usage data may include cumulative elapsed running time. The microprocessor has an associated memory in which the usage data is stored in association with corresponding data identifying the electrical devices. The system further includes an interface through which the usage and identifier data are extractable, to provide usage information for the respective electrical devices.

Abstract: An equipment label comprising an identity plate bearing information markings and an electronic tag having electrical contacts. The identity plate is provided with means for attachment to an item of equipment and is adapted to mount the electronic tag such that in use the label can be attached to the item of equipment with the identity plate's markings exposed to be read and the electrical contacts accessible for communication with the tag.

Abstract: An equipment label comprising an identity plate bearing information markings and an electronic tag having electrical contacts. The identity plate is provided with means for attachment to an item of equipment and is adapted to mount the electronic tag such that in use the label can be attached to the item of equipment with the identity plate's markings exposed to be read and the electrical contacts accessible for communication with the tag.