Selective Hydrogen Detection for Energy, Battery and Process Safety

Alphasense hydrogen (H2) sensors provide ppm-range monitoring for industrial safety, battery rooms, energy storage and process applications. A-Series and B-Series sensors are available with filtering and IST options to support both portable gas detectors and fixed systems.


Sensor Product Overview


Portable & Industrial Safety – A-Series H2 Sensors


  • H2-AF – A-Series filtered H2 sensors for portable and fixed gas detectors, 0–2,000 ppm range.

Fixed & High-range – B-Series H2 Sensors


  • H2-BF – B-Series filtered H2 sensors for fixed systems and higher-range applications up to 5000 ppm.

Integrated Smart Technology (IST) H2 Sensor Versions


  • H2-AF-IST | H2-BF-IST – For OEMs adopting Integrated Smart Technology (IST) across multiple gas channels.

Choosing the Right H2 Sensor by Application


Battery Rooms & Energy Storage


  • H2-AF – Portable detection and area monitors for battery rooms and confined spaces.
  • H2-BF – Fixed detection in battery charging areas and hydrogen infrastructure with high humidity and variable temperatures.

Process & Power Plants


  • H2-BF – Higher range and B-Series robustness for power generation, semiconductor and process applications.

Key Benefits Across the H2 Sensor Portfolio


  • Filtered electrochemical design to reduce cross-sensitivities and improve measurement confidence in complex gas mixtures.
  • Strong, repeatable response to hydrogen combined with low CO sensitivity, as characterized in the datasheet.
  • A- and B-Series mechanical options optimized for portable and fixed deployments.

Why OEMs Choose Alphasense


  • Hydrogen sensors share the same A/B mechanical standards, AFEs and ISBs as other Alphasense toxic sensors, simplifying multi-gas instrument design.
  • Detailed temperature-dependence and zero-current characterization supports accurate compensation algorithms in safety-critical applications.

How H2 Gas Sensors Work


H2 sensors are electrochemical amperometric devices: hydrogen reacts at the working electrode, generating a current proportional to concentration. The datasheets provide temperature-dependence curves that OEMs can use to implement precise compensation across –30 to +50 °C using either external electronics or on-board IST circuitry.

Why Measure Hydrogen Gas


Hydrogen is increasingly used in energy storage, fuel cells and industrial processes, but it is colourless, odourless and highly flammable. Monitoring H2 allows OEMs and end users to:

  • Detect accumulation in battery rooms, enclosures and process areas before reaching flammable limits.
  • Provide early warning and interlock control in power plants and hydrogen infrastructure.

Select H2 Sensor

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