The S4-H2S hydrogen sulfide gas detection sensor is a constant-potential electrolytic sensor. Hydrogen sulfide and oxygen undergo corresponding redox reactions on the working electrode and the counter electrode, respectively, and release charges to form a current. The generated current is proportional to the concentration of hydrogen sulfide. The hydrogen sulfide concentration can be determined by testing the current.
| Item | Parameter |
| model | S4-H2S |
| Detection principle | Electrochemical Three electrodes |
| Detection gas | H2S |
| Detection range | 0-100PPM |
| Maximum load concentration | 500PPM |
| Zero drift | ±2PPM |
| Resolution | 1PPM |
| Response time | ＜30s |
| Bias voltage | 0 |
| Load resistance | 5~30Ω |
| Load resistance | -30℃-50℃ |
| Load resistance | 15%RH to 90%RH(no condensation) |
| Repeatability | ＜±1% output signal |
| Long-term stability | ＜2% signal/month |
| Linearity | Linearity,regression coefficient R²=0.999 |
| Work pressure | 90 to 110 kPa |
| Shelf life | 12 months after delivery |
| Service life | 3 years |
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