Hydrogen Detectors – H2-AF / H2-AF+

  • PPM-level hydrogen detection
  • Available in standard (H2-AF) and smart (H2-AF+) versions
  • Integrated Smart Technology (IST) with onboard memory and temperature sensor (H2-AF+)
  • Plug-and-play operation with stored calibration data
  • Strong, repeatable response to hydrogen
  • Low cross-sensitivity to CO and other gases

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The H2-AF / H2-AF+ Hydrogen Sensor is a 3-electrode electrochemical hydrogen sensor designed for ppm-level detection of hydrogen gas in a wide range of applications, including portable gas detectors, fixed gas detection systems, industrial safety, environmental monitoring, and process control.

The sensor is available in two variants: the standard H2-AF and the H2-AF+ with Integrated Smart Technology (IST). The H2-AF+ incorporates an onboard memory chip and temperature sensor, enabling storage of calibration and identification data for plug-and-play operation and improved temperature compensation. The sensor provides a strong, repeatable response to hydrogen with low cross-sensitivity to other gases such as carbon monoxide.

Use Cases

  • Portable gas detection systems
  • Fixed gas detection systems
  • Industrial safety monitoring
  • Environmental air quality analysis
  • Process control applications

Capabilities

  • Detection range up to 2,000 ppm hydrogen (performance limit)
  • Response time (t90): <35 seconds
  • Resolution: ~0.7 ppm equivalent noise
  • Operating life: >24 months
  • Temperature-compensated measurement (via IST version)
  • I²C communication support (H2-AF+)
Alphasense Limited

Alphasense provides high-performance gas sensing technology critical for safety and leak detection across the hydrogen value chain. Their specialized sensors—including electrochemical cells for ppm-level detection and Pellistor (Catalytic Bead) sensors for LEL monitoring—are designed to detect hydrogen leaks in production facilities, storage areas, and fuel cell enclosures. By offering miniaturized, low-power components with fast response times, Alphasense enables OEMs to build reliable, portable, and fixed safety systems that protect personnel and infrastructure from hydrogen's high flammability.

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