A welding apparatus controlling a position of a welding arc, having a welding head housing an electrode producing the welding arc in a working zone. A first portion of information associated with the received SSS may be processed separately from a second portion of information associated with the received SSS. The container also includes a plurality of trapezoidal shaped upper chambers opening outwardly away from the center opening and a plurality of trapezoidal shaped covers for closing the upper and lower chambers. In a second embodiment, along with the same NOL, the sensor has a laminated free layer which includes a non-magnetic conductive layer, which also provides high output and low coercivity. Also provided are a utility network including the utility network interface device, a method of operating a utility network interface device, and a computer-readable recording medium having a computer program recorded thereon for operating a utility network interface device.