gas-sensitive field-effect transistor

gas-sensitive field-effect transistor

[′gas ¦sen·səd·iv ′fēld i‚fekt tran‚zis·tər]
(electronics)
A field-effect transistor whose gate electrode is composed of a material, such as palladium, that is sensitive to a particular gas, such as hydrogen, so that the gain of the transistor depends on the concentration of this gas.