SOH-A2 Dual Sulphur Dioxide / Hydrogen Sulphide Sensor

SO2 & H2S 2-Gas Sensor, Electrochemical, A-Series, SO2: 0–20 ppm; H2S: 0–100 ppm

Reliable gas detection for safety-critical monitoring and process control.

Alphasense SO2 / H2S sensors provide reliable 2-gas monitoring in 1 sensor solution. These 2-gas sensors detect both sulphur dioxide and hydrogen sulphide for industrial safety, portable and fixed gas detection, and process or biogas applications where fast response and stability are critical. These dual SO2/H2S sensors are recommended for portable multigas analyzers that monitor corrosive sulfur gases with different toxicologies



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Key Specifications:

 

Sensor Model

Target Gas

Package Size

Concentration Range

Sensitivity

T90 Response Time

Warranty

SOH-A2

Sulphur Dioxide (SO2) + Hydrogen Sulphide (H2S)

A-Series

SO2: 0–20 ppm;
H2S: 0–100 ppm

SO2: 140 to 250 nA/ppm H2S: 450 to 900 nA/ppm

SO2: <15 s
H2S: <25 s

24 months

 

Feature

Benefit

Combined SO2 and H2S detection

Provides two key sulphur species in a single A‑Series footprint.

Ideal for refineries and chemical plants

Supports monitoring of corrosive SO2 alongside toxic H2S.

Fast response on both channels

Enables responsive personal and area monitors in sulphur gas environments.

Simplifies 4‑gas and 5‑gas design

Reduces sensor count while maintaining comprehensive sulfur coverage.

Proven stability across temperature and humidity ranges

Delivers consistent performance in real-world conditions.

Long operational lifetime

Helps reduce maintenance and replacement frequency for OEMs and end users.