Workshop - What to Look for in Gas Detection and Measurement Instrumentation (39)

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Slide 39 of 76

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Metal Oxide Semiconductor (Solid State)

Theory - This sensor typically consists of a bead of tin oxide formed around two fine coils of platinum wire. When the bead is heated using one of the coils, the analyte gas will oxidize on the bead surface, changing the electrical conductivity as measured between the heated and unheated coils.
Gases Measured - Nearly all oxidizable gases can be detected on the solid state sensor.

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