“…One group contains TGS sensors 2602, 2610, and 2611, which are designed mainly for detection of natural gases. The second group consists of two TGS sensors (2600 and 2620) and AS‐MLV‐P2, which respond mainly to VOCs and general air contaminants (Gancarz, Wawrzyniak, Gawrysiak‐Witulska, Wiącek, Nawrocka, & Rusinek, ; Gancarz, Wawrzyniak, Gawrysiak‐Witulska, Wiącek, Nawrocka, Tadla et al., ; Rusinek et al., ). In the case of (Δ R / R ) max values, sensor TGS2611 is spaced from the other sensors, as shown in Figure A.…”