A Solid-State Proton Conductor Sensor with an Ammonia Sensitivity at Room Temperature
A new type of solid-state gas sensor using proton conductor (antimonic acid) is proposed for detecting small amounts of NH3 in air at room temperature. The sensor element has a four-probes type structure with outer two pt electrodes and inner two Ag probes. The sensor response was found to vary with the NH3 concentration (from 50 ppm to 5030 ppm) in air.