In pipeline operations, both pig signalers and pig trackers are used to monitor the progress of pipeline pigs, but they serve different functions and employ different technologies. A pig signaler, also known as a pig detector or pig passage indicator, is a device that detects the passage of a pig at a specific location in the pipeline. It typically consists of a sensor that is mounted on the outside of the pipeline and is activated by the pig's passage. The sensor can be mechanical, magnetic, acoustic, or optical. When the pig pas....
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