Development of a handheld sensor system system for the online measurement of hydrogen peroxide in aseptic filling systems

Abstract

241 6009 53235 A handheld sensor system for the online measurement of hydrogen peroxide (H 2 O 2 ) in aseptic sterilisation processes has been developed. It is based on a calorimetric-type gas sensor that consists of a differential set-up of two temperature sensors, of which one is catalytically activated and the second one is passivated and used as reference. The sensor principle relies in detecting a rise in temperature on the active sensor due to the exothermic reaction of H 2 O 2 on the catalytic surface. To characterise the sensor system towards H 2 O 2 sensitivity and other influencing factors, measurements have been carried out both at an experimental set-up and a manufacturer's sterilisation machine. Physical sensor characterisation was done by means of the optical microscopy.

Towards a multi‐sensor system for the evaluation of aseptic processes employing hydrogen peroxide vapour (H2O2)

“…Several attempts have been made to characterize sterilization processes by monitoring the influence parameters, as such the hydrogen peroxide concentration or temperature 15–21. However, monitoring of one single parameter is often not sufficient for an accurate evaluation of a sterilization process, since there is an interaction between the various influential parameters, such as temperature, pressure, gas flow and humidity, which can have a decisive effect on the inactivation of microorganisms.…”

Calorimetric Sensor for ${\rm H}_{2}{\rm O}_{2}/{\rm H}_{2}{\rm O}$ Mist Streams

“…H 2 O 2 can be determined in other contexts by sensor technologies based on chemiluminescent, electrochemical or calorimetric principles [8][9][10][11][12][13][14]. However, the existing sensor technologies are not appropriate for the H 2 O 2 -containing mist streams required in the new generation of medical sterilizing devices.…”

Flexible Calorimetric Gas Sensors for Detection of a Broad Concentration Range of Gaseous Hydrogen Peroxide: A Step Forward to Online Monitoring of Food‐Package Sterilization Processes

“…In general, the vapor detection of H 2 O 2 has already been approached by means of different techniques such as calorimetric detection, or sensitive detection of H 2 O 2 absorption by transition and colorimetric methods for various applications . The advantage of H 2 O 2 is its antimicrobial effect, and besides, it decomposes to water and oxygen, which are environmental‐friendly end‐products.…”