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Scraper Passage Indicator
Scraper Passage Indicators, or pig signallers as they are often called, are installed onto launcher and receiver units to confirm the launch or arrival of a pig.
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Acoustic Pig Locating
Smart Pingers
Pinger Receiver System -
Electromagnetic Pig Locating
Electromagnetic Transmitters
Electromagnetic Receiver System -
Non-Intrusive Pig Signallers
Magnetic
Ultrasonic