We consider a two-sensor array, employing nanoporous materials (zeolitic imidizolate frameworks, ZIFs) as gravimetric recognition elements, for detecting anomalous ternary gas compositions in a fruit ripening room. The chief analytes in a ripening room (near room temperature) are carbon dioxide (CO 2 ), released from fruit respiration, and ethylene (C 2 H 4 ), the fruit ripening hormone. Additionally, the humidity (H 2 O) varies.