The SS2198 is a high-sensitivity electrochemical hydrogen sulfide (H₂S) sensor capable of measuring concentrations in the 0–100 ppm range. It features a strong linear output of 700 ± 200 nA/ppm, fast response time under 20 seconds (T90), and high resolution of less than 0.1 ppm, making it ideal for low-concentration H₂S detection. With low cross-sensitivity to CO, H₂, SO₂, NO, and NO₂, the sensor performs reliably in complex gas environments. Its long lifespan (over 24 months) and excellent repeatability make it suitable for petrochemical, wastewater, refinery, mining, and confined space applications.