S4-HFTsensor is a constant potential electrolytic sensor. The hydrogen fluoride and oxygen will undergo the corresponding redox reaction on the working electrode and the counter electrode respectively and release the charge to form a current. The current generated is proportional to the concentration of hydrogen fluoride. The concentration of hydrogen fluoride can be determined by measuring the current.
| Item | Parameters |
| Model | S4-HF |
| Detection principle | ElectroChemical Three Electrodes |
| Detection gas | HF |
| Detection range | 0-10PPM |
| Maximum load concentration | 50PPM |
| Output signal | -300±100nA/PPM |
| Zero drift | 0~0.1PPM |
| Resolution | 0.1PPM |
| Response time | ≤120s |
| 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 to 50PPM |
| Work pressure | 90 to 110 kPa |
| Shelf life | 12 months after delivery |
| Service life | 2 years |
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