S4-PH3 is a constant potential electrolytic sensor. Phosphine and oxygen undergo corresponding redox reaction on the working electrode and the counter electrode and release charge to form current. The generated current is proportional to the concentration of phosphine.The concentration of phosphine can be determined by measuring the current.
| Item | Parameters |
| model | S4-PH3 |
| Detection principle | ELectrochemical Three Electrodes |
| Detection gas | PH3 |
| Detection range | 0-20PPM |
| Maximum load concentration | 100PPM |
| output signal | 1500±500nA/PPM |
| Zero drift | 0~1PPM |
| Resolution | 0.1PPM |
| 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 signalShanghai Sangbay Sensor |
| 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 | 2 years |
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