Transcription of Solid-State Gas Sensors - International Sensor Technology
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Solid-State Gas Sensors - International Sensor Technology
47 Chapter 4 Solid-State Gas SensorsChapter 4 Solid-State Gas SensorsWhen scientists were doing research work re-lated to semiconductor p-n junctions,1 theydiscovered that these junctions were sensitiveto environmental background that time, such a behavior was considered aproblem. This problem, however, was solved by en-capsulating the semiconductor chip so that it was nolonger exposed to the outside environment. Subse-quently, unsuccessful attempts were made to utilizethe sensitivity of the semiconductor junction as a gasdetection wasn t until 1968 that Mr. N. Taguchi marketeda simple semiconductor, or a Solid-State Sensor , for thedetection of hydrocarbons in LEL combustible intention was to provide an alternative to thepopular catalytic bead Sensor , which suffered fromseveral problems, including loss of sensitivity with timedue to poisoning and burning out when exposed tohigh gas 1972, International Sensor Technology (IST) inIrvine, California introduced a Solid-State Sensor forthe detection of hydrogen sulfide in a range of 0-10ppm.
51 Chapter 4 Solid-State Gas Sensors is one of its main advantages. For example, in chemi-cal plants, a gas monitoring system may involve the monitoring of many different gases and ranges, or
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