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The term NO x represents several forms of nitrogen oxides such as NO (nitric oxide), NO 2 (nitrogen dioxide) and N 2 O (nitrous oxide, also known as laughing gas).In a gasoline engine, NO is the most common form of NO x at around 93%, while NO 2 is around 5% and the rest is N 2 O.
The working electrode contacts both the electrolyte and the ambient air to be monitored, usually via a porous membrane. The electrolyte most commonly used is a mineral acid, but organic electrolytes are also used for some sensors. The electrodes and housing are usually in a plastic housing which contains a gas entry hole for the gas and ...
Once conditioned, the sample enters a sampling manifold and is measured by various gas analyzers, typically NO x and O 2 (and sometimes CO) for combustion turbines and engines running natural gas or diesel. NO x analyzers typically work using chemiluminescence. O 2 analyzers a magnetic field which attracts O 2 to measure the
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.
The symbol represents a "third body", a molecular species that is required to carry away energy from the exothermic reaction 2.Equation 4 relates the concentrations of NO x and ozone, and is known as the Leighton relationship.
A NO x adsorber is designed to reduce oxides of nitrogen emitted in the exhaust gas of a lean burn internal combustion engine.Lean burn engines, particularly diesels, present a special challenge to emission control system designers because of the relatively high levels of O 2 (atmospheric oxygen) in the exhaust gas.
It is the first improved analyzer that is able to detect more than one component of a sample gas at one time. Earlier analyzers were held back by the fact that a particular gas also has lower absorption bands in the infrared. The invention of 1975 has as many detectors as the number of gases to be measured.
[17] [18] However, the accelerator design principles and manufacturing quality need further improvement for continuous operation in industrial conditions. [19] No radioactivity is required or created in the process. The electron beam is generated by a device similar to the electron gun in a TV set. This device is called an accelerator.