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A scrubber apparatus and controller include a gas sensor, and processor for controlling treatment of gas responsive to the sensed undesired constituent so as to enhance reduction of the undesired constituent. The processor further determines a sensor fault and may generate an alarm signal responsive to the sensor fault. The gas sensor is preferably an electrochemical cell comprising an electrolyte and a pair of electrodes associated with the electrolyte. A sensor fault may be determined based upon an impedance of the electrolyte and the pair of electrodes. In addition, the electrochemical cell may include a gas permeable membrane and a pair of electrodes on opposing sides of the membrane to permit determination of damage to the membrane based upon an impedance measurement using the pair of electrodes.
A scrubber apparatus for treating a gas associated with wastewater to reduce an undesired constituent in the gas, said scrubber apparatus comprising:
A controller for use with a scrubber apparatus comprising a vessel and treatment means for reducing the undesired constituent in the gas flowing through the vessel, said controller comprising:
Dependencies are inferred from the claim text.