Patent attributes
Stand-alone remote sensor arrangement for monitoring parameter activity in a cable including a sensor unit, a power source unit, a connecting cable, and a control unit. The sensor unit includes a shielded housing enclosing a toroid-shaped core fixed around the cable to be monitored. The arrangement operates in a low current consumption mode and a measurement mode, in which measurement mode a Hall sensor element senses a predetermined parameter activity of the cable. The sensor unit includes a sensor activation unit arranged and structured to sense parameters related to magnetic field variations in the core caused by parameter activity of the cable, and to generate a sensor activation signal including parameter values dependent on sensed parameters. The control unit receives the signal and evaluates the parameter values in relation to predetermined mode changing criteria, and changes mode of operation of the arrangement dependent on the result of the evaluation.
