Abstract: Described herein is a gas meter system (5) for detecting toxic gas combinations including a housing (10) having an opening (20), a measuring cell (15) enclosed by the housing and comprising a plurality of gas sensors (17) in fluid communication with the environment via the opening in the housing, and an evaluating circuit (32). The gas sensors detects a concentration of a first gas and a concentration of a second gas so the evaluating circuit can identify a hazard due to an additive or synergistic toxic effect upon combined exposure to the first gas and the second gas. Related apparatus, systems, methods and/or articles are described.