A multi-port valve device to divert flow of a fluid from a piggable transfer pipe line into a branch pipeline, and simultaneously prevent a line clearing device from flowing with that fluid into the branch pipeline. This stand supports the weight of a large-sized display and allows a user to swivel the display around an axis of the supporting member, and change the distance between the base and the display. A high gain amplifier is coupled between an integrator input node and amplifier output node. Each centroid may be assigned a confidence value, indicating the likelihood that it corresponds to a true object, based on the size and shape of the cluster, as well as the probabilities of its constituent pixels. As a read-head is detected to move from zone-to-zone, coils may be activated to transmit information in those zones. The present method more accurately determines the location, as well as the saturation level, of possible hydrocarbon reservoirs.