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  2. Urine-indicator dye - Wikipedia

    en.wikipedia.org/wiki/Urine-indicator_dye

    Rumours of the origin of urine indicator-dye go back at least as far as 1958, [1] and the story is commonly told to children by parents who do not want them to urinate in the pool. [3] A 1985 biography of Orson Welles describes him using such a dye as part of a prank in 1937.

  3. Leak detection - Wikipedia

    en.wikipedia.org/wiki/Leak_detection

    The primary purpose of leak detection systems (LDS) is to help pipeline controllers to detect and localize leaks. LDS provide alarms and display other related data to the pipeline controllers to assist decision-making. Pipeline leak detection systems can also enhance productivity and system reliability thanks to reduced downtime and inspection ...

  4. Methylene blue - Wikipedia

    en.wikipedia.org/wiki/Methylene_blue

    Methylene blue is also used as a dye in chromoendoscopy, and is sprayed onto the mucosa of the gastrointestinal tract in order to identify dysplasia, or pre-cancerous lesions. Intravenously injected methylene blue is readily released into the urine and thus can be used to test the urinary tract for leaks or fistulas. [citation needed]

  5. Dye penetrant inspection - Wikipedia

    en.wikipedia.org/wiki/Dye_penetrant_inspection

    Disadvantages include the detection of only surface flaws, skin irritation, and the inspection should be on a smooth clean surface where excessive penetrant can be removed prior to being developed. Conducting the test on rough surfaces, such as "as-welded" welds, will make it difficult to remove any excessive penetrant and could result in false ...

  6. Fluorescent penetrant inspection - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_penetrant...

    Fluorescent penetrant inspection (FPI) is a type of dye penetrant inspection in which a fluorescent dye is applied to the surface of a non-porous material in order to detect defects that may compromise the integrity or quality of the part in question. FPI is noted for its low cost and simple process, and is used widely in a variety of industries.

  7. Leak detector - Wikipedia

    en.wikipedia.org/wiki/Leak_detector

    Leak detector may refer to: Leak noise correlator; Helium mass spectrometer; Water detector; Gas detector; See also. Water sensor This page was last edited on 16 ...

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