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  2. Explosive gas leak detector - Wikipedia

    en.wikipedia.org/wiki/Explosive_gas_leak_detector

    A detector for propane is best placed down low near the floor, as propane is heavier than air. [3] A detector for natural gas (city gas) is best placed up high, near the ceiling. [3]

  3. Tracer-gas leak testing - Wikipedia

    en.wikipedia.org/wiki/Tracer-gas_leak_testing

    A tracer-gas leak testing method is a nondestructive testing method that detects gas leaks.A variety of methods with different sensitivities exist. Tracer-gas leak testing is used in the petrochemical industry, the automotive industry, the construction industry [1] and in the manufacture of semiconductors, among other uses.

  4. Gas detector - Wikipedia

    en.wikipedia.org/wiki/Gas_detector

    A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. A gas detector can sound an alarm to operators in the area where the leak is occurring, giving them the opportunity to leave.

  5. 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.

  6. Open Space Institute - Wikipedia

    en.wikipedia.org/wiki/Open_Space_Institute

    Open Space Institute (OSI) is a conservation organization that protects land for clean drinking water, public recreation, healthy communities, wildlife habitat, and climate protection. [1] Established in 1974, OSI achieves its goals through land acquisition, [ 2 ] fiscal sponsorship, [ 1 ] regional loan and grant programs, [ 3 ] park and trail ...

  7. Infrared open-path detector - Wikipedia

    en.wikipedia.org/wiki/Infrared_open-path_detector

    An open path detector usually costs more than a single point detector, so there is little incentive for applications that play to a point detector's strengths: where the point detector can be placed at the known location of the highest gas concentration, and a relatively slow response is acceptable. The open path detector excels in outdoor ...

  8. Gas leak - Wikipedia

    en.wikipedia.org/wiki/Gas_leak

    Any reading between 20% LEL and 80% LEL in a confined space. Any reading on a pipeline operating at 30 percent specified minimum yield strength (SMYS) or greater, in a class 3 or 4 location, [clarification needed] which does not qualify as a Grade 1 leak. Any reading of 80% LEL, or greater, in gas associated sub-structures.

  9. Carbon monoxide detector - Wikipedia

    en.wikipedia.org/wiki/Carbon_monoxide_detector

    The primary purpose of CO detectors is to sound an alarm to warn occupants of an enclosed space of a dangerous level of carbon monoxide. The alarm should sound within 60 minutes if the concentration rises to 70 PPM, within 10 minutes at 150 PPM, in 4 minutes at 400 PPM, and immediately at 500 PPM or greater.