Hydrogen Peroxide Sensing for Sterilisation and Clean Production

Alphasense hydrogen peroxide (H2O2) sensors enable monitoring of vapour-phase H2O2 used in sterilisation, disinfection and industrial processes. A-Series and B-Series electrochemical sensors are available in analogue and IST variants for portable and fixed instruments

Sensor Product Overview


  • Portable & Industrial Safety – A-Series H2O2 Sensors

  • H2O2-A1 – A-Series hydrogen peroxide PPM sensor for portable gas detectors and fixed gas detection systems.

  • Fixed Systems – B-Series H2O2 Sensors

  • H2O2-B1 – B-Series sensors for fixed installations in sterilisation, textiles, and water/wastewater treatment.

  • Integrated Smart Technology (IST) Versions

    • H2O2 sensors listed above are also available with IST—Integrated Smart Technology—providing:
  • On-sensor electronics for digital output of calibration data and sensor temperature
  • Factory calibration storage
  • Simplified integration for OEMs
  • Plug and play operation

IST variants include:

H2O2-A1-IST | H2O2-B1-IST

Choosing the Right Sensor by Application


  • Sterilisation (Hospitals, Pharma, Food)

  • H2O2-A1 – Portable leak detectors and temporary area monitors.
  • H2O2-B1 – Fixed room or chamber monitoring in high-humidity conditions.

  • Textiles and Water/Wastewater Treatment

  • H2O2-A1 | H2O2-B1 – Process monitoring where hydrogen peroxide is used for bleaching or disinfection.

Key Benefits Across the Sensor Portfolio


  • PPM-range sensing for industrial safety and process control applications using H2O2.
  • A/B-Series formats align with existing multi-gas platforms in portable and fixed instruments.
  • IST “+” variants simplify temperature compensation and field replacement in critical sterilisation systems.

Why OEMs Choose Alphasense?


  • Common mechanical, electrical and digital architectures shared across H2O2, H2, EtO and other oxidizing gases reduce development effort and inventory.
  • Detailed temperature and zero-current performance data supports high-accuracy compensation in tightly controlled environments.

How H2O2 Sensors Work?


H2O2 sensors operate as electrochemical amperometric cells. Hydrogen peroxide vapour reacts at the working electrode, with the resulting current measured by the instrument or IST board. Temperature-dependence and zero-current data from the datasheet guide OEM compensation algorithms for stable long-term measurements.

Why Measure Hydrogen Peroxide Gas?


Vapour-phase H2O2 is used for room decontamination, sterilisation of equipment and surfaces, and industrial processing. Over-exposure is harmful to workers and can damage materials. Monitoring H2O2 ensures:

  • Safe re-entry times post-sterilisation.
  • Correct dosing and effective decontamination while protecting personnel and assets.

Select H2O2 Sensor

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