A solid-state potentiometric sensor for hydrogen detection in air

A solid-state potentiometric hydrogen gas sensor based on hydronium Nasicon, a hydrogen ion conducting solid electrolyte, is described. The device incorporates a patented silver-based reference electrode and a palladium working electrode. The sensor is robust, simple, fast, and capable of detecting hydrogen concentrations from at least 0.01 to 100%, a range of four orders of magnitude, in oxidizing and non-oxidizing atmospheres. The room temperature response characteristics of the sensor are reported.