S4-H2 is a constant potential electrolytic sensor. The hydrogen and oxygen react with each other in the working electrode and the counter electrode and release the charge to form a current. The current generated is proportional to the concentration of hydrogen. The concentration of hydrogen can be determined by measuring the current.
| Item | Parameters | |
| model | S4-H2 | |
| Detection principle | ELectrochemical Three Electrodes | |
| Detection gas | H2 | |
| Detection range | 0-1000PPM | |
| Maximum load concentration | 2000PPM | |
| output signal | 20±10nA/PPM | |
| Zero drift | ±5PPM | |
| Resolution | 1PPM | |
| Response time | <60s | |
| Bias voltage | 0 | |
| Load resistance | 5~30Ω | |
| Working Temperature | -30℃-50℃ | |
| Working Humidity | 15%RH to 90%RH(no condensation) | |
| Repeatability | ＜±2% output signal | |
| Long-term stability | ＜2% signal/month | |
| Linearity | Linearity 2000PPM | |
| Work pressure | 90 to 110 kPa | |
| Shelf life | 12 months after delivery | |
| Service life | 2 years | |
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