Intrusive detectors have a probe such as a trigger or plunger inserted thru the pipe wall into the flow of the pipeline. It is activated by the pig tripping the device. The signal can be a visual flag, electrical notification at control room, light, etc.
TDW Pig Sig V
PIG-SIG® V Scraper Passage Indicator is a device...
TDW Pig Detector IV
TDW’s PIG-SIG® IV Scraper Passage Indicator is a...
Maloney Series III Detector
Maloney Series III Detector is a ʻPig Signalerʼ for...