SS21CH (CO & H₂S)

Electrochemical CO & H₂S Dual Sensor

DESCRIPTION

The SS21CH is an electrochemical dual-gas sensor capable of simultaneously detecting carbon monoxide (CO) and hydrogen sulfide (H₂S) using a single sensor module. It measures CO in the 0–500 ppm range and H₂S in the 0–200 ppm range, with a fast response time of less than 30 seconds. This sensor is ideal for use in portable multi-gas detectors, industrial safety systems, residential CO alarms, and environments such as sewage and wastewater treatment plants. It features low cross-sensitivity between CO and H₂S, high long-term stability, and a lifespan exceeding 24 months—making it suitable for any field requiring accurate monitoring in mixed-gas environments.

KEY FEATURES

- Measuring Range: 0–500 ppm CO / 0–200 ppm H₂S
- Output Signal: 80 ± 20 nA/ppm (CO), 775 ± 275 nA/ppm (H₂S)
- Response Time: T90 < 30 seconds
- Resolution: ≤0.5 ppm (depends on electronics)
- Long-Term Drift: ≤5% per year
- Operating Life: ≥24 months
- Low Cross-Sensitivity: Minimal mutual interference between CO and H₂S