Modular Analytical Multicomponent Analysis in Gas Sensor Aarrays

Abstract

A multi-sensor system is a chemical sensor system which quantitatively and qualitatively records gases with a combination of cross-sensitive gas sensor arrays and pattern recognition software. This paper addresses the issue of data analysis for identification of gases in a gas sensor array. We introduce a software tool for gas sensor array configuration and simulation. It concerns thereby about a modular software package for the acquisition of data of different sensors. A signal evaluation algorithm referred to as matrix method was used specifically for the software tool. This matrix method computes the gas concentrations from the signals of a sensor array. The software tool was used for the simulation of an array of five sensors to determine gas concentration of CH 4 , NH 3 , H 2 , CO and C 2 H 5 OH. The results of the present simulated sensor array indicate that the software tool is capable of the following: (a) identify a gas independently of its concentration; (b) estimate the concentration of the gas, even if the system was not previously exposed to this concentration; (c) tell when a gas concentration exceeds a certain value. A gas sensor data base was build for the configuration of the software. With the data base one can create, generate and manage scenarios and source files for the simulation. With the gas sensor data base and the simulation software an on-line Web-based version was developed, with which the user can configure and simulate sensor arrays on-line.

Reservoir computing compensates slow response of chemosensor arrays exposed to fast varying gas concentrations in continuous monitoring

“…where b 1 , β 1 and b 2 , β 2 are the coefficients of the sensor for the two gases present in the mixture, at concentrations c 1 and c 2 respectively [37]. Hence, from the sensor behavior when the sensor is exposed to pure compounds, the model predicts sensor response when it is exposed to gas mixtures.…”

A Novel Thin‐Film Copper Array Based on an Organic/Inorganic Sensor Hybrid: Microfabrication, Potentiometric Characterization, and Flow‐Injection Analysis Application

“…A significant number of electronic tongues-type sensors based on integrated microelectrodes [4 -6], fluorescent self-assembled monolayers [7], nanostructured thin-films of conducting polymers [8,9], multiple light-addressable potentiometric sensors [10,11], simple unspecific sensors [12] and chalcogenide glass thin-film sensors [13] have been developed. Fabrication, evaluation and application of different electronic noses have been also reported [2,14,15]. Flowinjection analysis (FIA) systems based on such multisensor arrays have been designed and applied recently for the determination of calcium ions [16], biomedical species [17] and ammonium ions [18].…”