Monitoring the microbicidal effectiveness of gaseous hydrogen peroxide in sterilisation processes by means of a calorimetric gas sensor

► The microbicidal effectiveness of gaseous hydrogen peroxide was investigated. ► Contact time and H2O2 concentration have a strong influence on the microbicidal effectiveness. ► A calorimetric gas sensor was characterised in gaseous H2O2 at elevated gas temperatures. ► A correlation model between sensor signal and microbial inactivation kinetics was established.