H2-AF Hydrogen Sensor

H2 Gas Sensor, Electrochemical, A-Series, 0–2,000 ppm filtered

Filtered hydrogen sensor for portable and fixed safety monitoring

The H2-AF is a 0–2,000 ppm hydrogen sensor in the A-Series package, designed for portable and fixed instruments used in battery rooms, confined spaces and industrial safety. With 10–40 nA / ppm sensitivity at 400 ppm H2 and T90 < 35 s, it delivers a strong, repeatable response combined with low CO cross-sensitivity. A filter capacity rated in H2S ppm-hours, together with > 24-month operating life, provides robust performance in mixed-gas environments.
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Key Specifications:

 

Sensor Model

Target Gas

Package Size

Concentration Range

Sensitivity

T90 Response Time

Lifetime / Warranty

H2-AF

Hydrogen (H2)

A-Series

0–2,000 ppm H2

10 to 40 nA / ppm (in 400 ppm H2)

< 35 s (0 →400 ppm step)

> 24 months (24-month warranted)

 

Feature

Benefit

0–2,000 ppm H2 range

Covers leak detection and safety thresholds in battery rooms and process equipment.

Low cross-sensitivity to CO

Improves selectivity for H2 in combustion and industrial environments

Fast T90 < 35 s

Supports rapid alarm response for worker safety and asset protection

Temperature-dependent behaviour characterised

Repeatable temperature response enables accurate software compensation

Filter capacity for H2S

Protects the sensor in environments where hydrogen sulphide may be present
 

  • Resources

    Technical Datasheet

    Application Notes

    Design Considerations

    • Guidance on bias, load resistor selection and AFE design for H2 sensors.

    Safety Documents

    Related Products

    • Accessories
      • 4-20 mA Digital Board
      • Foam Seal
      • Dust Filter
      • Gas Hoods
    • Frequently bought together
      • CO, O2 and LEL channels for multi-gas battery-room and utility monitors.
    • Other related H2S sensors in the Alphasense portfolio:
      • H2-BF B-Series sensor for extended-range fixed installations.