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A chemical sensor array is a sensor architecture with multiple sensor components that create a pattern for analyte detection from the additive responses of individual sensor components. There exist several types of chemical sensor arrays including electronic, optical, acoustic wave, and potentiometric devices.
A chemical sensor is a self-contained analytical device that can provide information about the chemical composition of its environment, that is, a liquid or a gas phase. [ 5 ] [ 6 ] The information is provided in the form of a measurable physical signal that is correlated with the concentration of a certain chemical species (termed as analyte ).
Potentiometric solid state gas sensors have been generally classified into three broad groups. Type I sensors have an electrolyte containing mobile ions of the chemical species in the gas phase that it is monitoring. The commercial product, YSZ oxygen sensor, [1] is an example of type I.
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As an example of classification, nanosensors that use molecularly imprinted polymers (MIP) can be divided into three categories, which are electrochemical, piezoelectric, or spectroscopic sensors. Electrochemical sensors induce a change in the electrochemical properties of the sensing material, which includes charge , conductivity , and ...
Sensors are usually designed so that the gas supply is limited by diffusion, and thus the output from the sensor is linearly proportional to the gas concentration. This linear output is one of the advantages of electrochemical sensors over other sensor technologies (e.g. infrared), whose output must be linearized before they can be used.
1040: Chemical Weapons and Equipment. 1045: Launchers, Torpedo and Depth Charge; 1055: Launchers, Rocket and Pyrotechnic; 1070: Nets and Booms, Ordnance; 1075: Degaussing and Mine Sweeping Equipment; 1080: Camouflage and Deception Equipment; 1090: Assemblies Interchangeable Between Weapons in Two or More Classes