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  2. Endress+Hauser Optical Analysis - Wikipedia

    en.wikipedia.org/wiki/Endress+Hauser_Optical...

    Endress+Hauser Optical Analysis, Inc. is a manufacturer of optical-based gas sensors for the industrial process, environmental monitoring and clean technology markets. The company's sensors measure the absorption of laser light at specific wavelengths to detect carbon dioxide and water vapor in industrial process control and environmental monitoring applications.

  3. Spectrum analyzer - Wikipedia

    en.wikipedia.org/wiki/Spectrum_analyzer

    Since particular machinery problems generate vibration at specific frequencies, machinery faults can be detected or diagnosed. Vibration Spectrum Analyzers use the signal from different types of sensor, such as: accelerometers, velocity transducers and proximity sensors. The uses of a vibration spectrum analyzer in machine condition monitoring ...

  4. Nondispersive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Nondispersive_infrared_sensor

    A nondispersive infrared sensor (or NDIR sensor) is a simple spectroscopic sensor often used as a gas detector.It is non-dispersive in the fact that no dispersive element (e.g a prism or diffraction grating as is often present in other spectrometers) is used to separate out (like a monochromator) the broadband light into a narrow spectrum suitable for gas sensing.

  5. Laser absorption spectrometry - Wikipedia

    en.wikipedia.org/wiki/Laser_absorption_spectrometry

    Laser absorption spectrometry (LAS) refers to techniques that use lasers to assess the concentration or amount of a species in gas phase by absorption spectrometry (AS). Optical spectroscopic techniques in general, and laser-based techniques in particular, have a great potential for detection and monitoring of constituents in gas phase .

  6. Optical power meter - Wikipedia

    en.wikipedia.org/wiki/Optical_power_meter

    An important part of an optical power meter sensor, is the fiber optic connector interface. Careful optical design is required to avoid significant accuracy problems when used with the wide variety of fiber types and connectors typically encountered. Another important component, is the sensor input amplifier.

  7. Fix problems signing into your AOL account - AOL Help

    help.aol.com/articles/help-signing-in

    Use the Sign-in Helper to locate your username and regain access to your account by entering your recovery mobile number or alternate email address.; To manage and recover your account if you forget your password or username, make sure you have access to the recovery phone number or alternate email address you've added to your AOL account.

  8. Republican senator blocks promotion of general who oversaw ...

    www.aol.com/republican-senator-blocks-promotion...

    A Republican senator has blocked the promotion of a general who oversaw the US withdrawal from Afghanistan, according to a source familiar with the matter, as President-elect Donald Trump has ...

  9. How Long You Were Expected to Live the Year You Were Born

    www.aol.com/long-were-expected-live-were...

    1940. Overall life expectancy: 62.9 Women: 65.2 Men: 60.8 The United States began the ’40s on an upswing, with life expectancy up sharply from 58.5 years in 1936, when the nation was still ...