Abstract: Sulfur resistant sensors and a process analytic system employing such sensors are provided. The sensors generally include a treatment or material that is adapted to increase the resistance of certain portions of the sensors to exposure to sulfur. In one aspect, an improved sulfur-resistant process analytic system includes a probe with one or more sulfur-resistant sensors therein coupled to a controller, a thermal control module, and a source of blowback gas.

Abstract: Sulfur resistant sensors and a process analytic system employing such sensors are provided. The sensors generally include a treatment or material that is adapted to increase the resistance of certain portions of the sensors to exposure to sulfur. In one aspect, an improved sulfur-resistant process analytic system includes a probe with one or more sulfur-resistant sensors therein coupled to a controller, a thermal control module, and a source of blowback gas.

Abstract: An oxygen sensor includes an electrolytic cell having a solid electrolyte capable of conducting oxygen ions at high temperatures and two electrodes oppositely attached to the electrolyte. The electrodes are generally made of porous, electron-conducting material, typically platinum, stable in high temperature. The electrolytic cell is treated with alternating current (AC) at a relatively high temperature for a period of time. The electrode treatment reduces impedance of the oxygen sensor. The electrode treatment can be used as a step in sensor manufacturing, as part of the warm-up cycle of an operational sensor or as part of a maintenance or repair schedule.