The H4NO nitrogen monoxide gas detection sensor is a potentiostatic electrolytic sensor. Nitrogen monoxide and oxygen undergo corresponding redox reactions at the working electrode and counter electrode respectively, releasing charges to form an electric current. The magnitude of this current is directly proportional to the nitrogen monoxide concentration. By measuring the current, the nitrogen monoxide concentration can be determined.
| Item | Parameter |
| Model number | H4NO-250 |
| Detection principle | Electrochemical three electrodes |
| Detection gas | NO |
| Detection range | 0-250PPM |
| Maximum load concentration | 500PPM |
| Sensitivity | 400±100nA/PPM |
| Zero drift | -30℃~30℃ <±1PPM, 30℃~50℃ <+4PPM |
| Resolution | ＜1PPM |
| Response time | ＜30s |
| Bias | +300mV |
| Load resistance | 5~30Ω |
| Temperature range | -30℃-50℃ |
| Humidity range | 15%RH to 90%RH (no condensation) |
| Repeatability | ＜1% output signal |
| Long-term stability | ＜2% signal/month |
| Linearity | Linearity,The regression coefficient R²=0.999 |
| Work pressure | 90 to 110 kPa |
| Shelf life | 18 months after delivery |
| Service life | 2 years |
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