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PIG-SIG® V Scraper Passage Indicator is a device installed at prescribed intervals on pipelines to detect the passage of a pig or sphere. The most common indicators have a trigger extending into pipelines through a welded fitting, or nipple that has been tapped. When a pig passes, the trigger is tripped which immediately activates a signaling mechanism.
Signaling systems available with the PIG-SIG V include a flag indicator, an electrical indicator or a flag/electrical indicator. All are compatible with all standard THREAD-O-RING™ nipples previously sold by TDW and are interchangeable. This makes it possible to order the PIG-SIG V unit as an upgrade conversion kit without nipple, or as a new installation kit complete with nipple.
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