| parameter | Technical index | Communication port | RS485 |
| NO measuring range | 0-250ppm | Power supply | 12V-24V DC |
| measurement method | Electrochemical sensors | Power consumption | ≤0.15W（12V DC , 25℃） |
| measurement accuracy | 3%F.s | Operating temperature | -30至50℃ |
| Response time (T90, seconds) | Less than 15 seconds | Working humidity environment | 15-95%RH(Relative humidity), no condensation |
| Warranty | Host warranty is 2 years, gas probe warranty is 1 year | Working pressure range | Standard atmospheric pressure ±10% |
| Baud rate | 2400/4800/9600 | Dimensions | 110×85×44mm3O |