Abstract: Methods, apparatuses and systems for providing gas detecting apparatuses (e.g., electrochemical detectors) are disclosed herein. An example gas detecting apparatus may comprise a sensing component comprising: a first sensing electrode configured to generate a first concentration level indication associated with a first portion of a sample gaseous substance disposed within the sensing component; and a second sensing electrode operatively coupled to a filtering element that is configured to absorb at least one substance from the sample gaseous substance, wherein the second sensing electrode is configured to generate a second concentration level indication associated with a second portion of the sample gaseous substance.

Abstract: Embodiments of the present disclosure provide for dynamic iterative baseline adjustment. Such embodiments provide improvements to sensors requiring such adjustments, for example by better accounting for baseline drift and/or other baseline inaccuracies of a sensor. In one example context, a gas sensor is provided that performs such dynamic iterative baseline adjustment to better calibrate the output value of the gas sensor. Some embodiments include determining a set of measured values comprises a number of low-point measured values that exceeds a baseline updating threshold, determining an updated baseline value set, for example by determining an average low-point measured value for each baseline factor interval of a set of baseline factor intervals, and updating the baseline value set to the updated baseline value set, and optionally performing a corrective baseline algorithm on the updated baseline value set. The updated baseline value set may be utilized to correct subsequently measured raw data values.

Abstract: Various embodiments are directed to an electrochemical vinyl chloride sensor configured to detect a volume of vinyl chloride present within the volume of ambient gas. The electrochemical vinyl chloride sensor comprises a housing comprising an opening configured to receive a volume of ambient gas and an interior reservoir fluidly connected to the opening; and a plurality of electrodes fixedly disposed within the interior reservoir of the housing. The plurality of electrodes comprises a sensing electrode, a counter electrode, and a reference electrode, at least one of which comprises a catalytic material having an amorphous structure. A bias voltage of at least approximately less than 300 mV (e.g., 200 mV) applied between the sensing electrode and the reference electrode. The plurality of electrodes comprises a three-electrode stack configured such that the counter electrode is disposed between the sensing electrode and the reference electrode.