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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. [1] [6]
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 ...
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 ...
Allura Red AC is a popular dye used worldwide. Annual production in 1980 was greater than 2.3 million kilograms. [5] It was introduced as a replacement for amaranth in the United States. [6] The European Union approved Allura Red AC as a food colorant in 1994, but EU countries' local laws banning food colorants were preserved. [7]
The M256/M256A1 Chemical Detection Kits include not only M8 Detector Paper for detecting the presence of toxins, but also enzyme-based "tickets" for identifying which agent is present. The M18 kit includes M8 sheets, "tickets", and test tubes loaded with colorimetric reagents for measuring the concentration of toxins.
Active systems are often using a wearable on the swimmer, such as a wristband, that monitors the behaviour and position of the swimmer. If the swimmer is detected to be under water för a certain period, an alarm is triggered and through acoustic underwater communication from the wristband to receivers installed in the pool the alarm is transferred to on-site lifeguards that immediately can ...