GAS SENSORS.

Abstract

Many types of chemical sensors have been devised for the detection and monitoring of chemical substances contained in gases (potentiometric and amperometric electrochemical sensors, solid state sensors, gasfets). A survey and brief comparison of basic principles, capabilities and limitations will be presented. The recent development of solid-state potentiometric sensors is related to intensive research in solid-state electrochemistry and micro-ionics. Besides the industrially developed oxygen zirconia device, solid electrolyte sensors for other gaseous species (Cl//2, SO//2, SO//3, H//2, CO//2) have been studied.