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  2. Photoionization detector - Wikipedia

    en.wikipedia.org/wiki/Photoionization_detector

    A photoionization detector or PID is a type of gas detector. Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm). The photoionization detector is an efficient and inexpensive detector for many gas and vapor analytes.

  3. Gas detector - Wikipedia

    en.wikipedia.org/wiki/Gas_detector

    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. This type of device is important because there are many gases that can be harmful to organic life ...

  4. Ion mobility spectrometry - Wikipedia

    en.wikipedia.org/wiki/Ion_mobility_spectrometry

    Ion mobility spectrometry. Ion mobility spectrometry (IMS) It is a method of conducting analytical research that separates and identifies ionized molecules present in the gas phase based on the mobility of the molecules in a carrier buffer gas. Even though it is used extensively for military or security objectives, such as detecting drugs and ...

  5. Gaseous fire suppression - Wikipedia

    en.wikipedia.org/wiki/Gaseous_fire_suppression

    Canisters containing argon gas for use in extinguishing fire in a server room without damaging equipment. Gaseous fire suppression, also called clean agent fire suppression, is the use of inert gases and chemical agents to extinguish a fire. These agents are governed by the National Fire Protection Association (NFPA) Standard for Clean Agent ...

  6. Helium mass spectrometer - Wikipedia

    en.wikipedia.org/wiki/Helium_mass_spectrometer

    A helium mass spectrometer is an instrument commonly used to detect and locate small leaks. It was initially developed in the Manhattan Project during World War II to find extremely small leaks in the gas diffusion process of uranium enrichment plants. [1] It typically uses a vacuum chamber in which a sealed container filled with helium is placed.

  7. 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] Some detectors can detect both natural gas or propane, but this requires a compromise location. [4]