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  2. Leak detection - Wikipedia

    en.wikipedia.org/wiki/Leak_detection

    Chris Cassidy works with an ultrasonic leak detector on the International Space Station. Escaping liquids create an acoustic signal as they pass through a hole in the pipe. Acoustic sensors affixed to the outside of the pipeline can create a baseline acoustic "fingerprint" of the line from the internal noise of the pipeline in its undamaged state.

  3. Tracer-gas leak testing - Wikipedia

    en.wikipedia.org/wiki/Tracer-gas_leak_testing

    As well as airbags, the air conditioning system, fuel system, and exhaust system require testing for leaks. Pacemakers and catheters have to be tested for efficacy and longevity. On planes, tracer-gas leak testing is used to quickly and safely locate fuel leaks, [3] as well as to check oxygen distribution devices and cabin pressurization systems.

  4. Ultrasonic transducer - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_transducer

    A curvilinear array ultrasonic transducer for use in medical ultrasonography Inside construction of a Philips C5-2 128 element curved array ultrasound sensor. Ultrasonic transducers and ultrasonic sensors are devices that generate or sense ultrasound energy. They can be divided into three broad categories: transmitters, receivers and transceivers.

  5. Gas detector - Wikipedia

    en.wikipedia.org/wiki/Gas_detector

    The ultrasonic gas leak detector then produces an alarm when there is an ultrasonic deviation from the normal condition of background noise. Ultrasonic gas leak detectors cannot measure gas concentration, but the device is able to determine the leak rate of an escaping gas because the ultrasonic sound level depends on the gas pressure and size ...

  6. 4. Qualifications and Experience

    images.huffingtonpost.com/2013-04-08-ERM_cut.pdf

    provides full-service NEPA 4. Qualifications and Experience Throughout the U.S., ERM support to private sector clients, federal agencies, and state

  7. Pigging - Wikipedia

    en.wikipedia.org/wiki/Pigging

    An ultrasonic leak-detection pig. A cleaning pig for a 150-millimetre (6 in) oil pipeline. The wire brush encircles the shaft and scours the interior of the pipeline. A scraper pig shown at the Trans-Alaska Pipeline System Visitors Center

  8. When You Need Seal A Leak, Look To These Expert ... - AOL

    www.aol.com/lifestyle/best-caulk-guns-213800979.html

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  9. Space Station air leak persists; December ushers in meteor ...

    www.aol.com/space-station-air-leak-persists...

    The Russian module of the International Space Station (ISS) has an air leak that has NASA concerned about a “catastrophic failure” of the module according to Bob Cabana, ISS Advisory Committee ...