A novel thin-film gas sensor was realized to detect the H 2 O 2 concentration up to 10 vol.-% during microbial reduction of carton packages by hydrogen peroxide vapor in aseptic filling processes. The calorimetric sensing device contains two meander-shaped platinum layers as temperature sensing elements, both have been passivated with perfluoralkoxy and one additionally covered with catalytically active manganese oxide particles. First sensor characterizations have shown a sensitivity towards H 2 O 2 of 0.57 °C/vol.-%. In the next step, the calorimetric gas sensor will be coupled on an RFID circuit for in-line detection of H 2 O 2 .
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