| Item | Technical Specification |
| Range(concentration) | 0-20ppm |
| Accuracy | ±（4ppm+2%F•S） |
| Resolution | 1ppm |
| Supply | Mark on the label |
| Output | RS485 |
| Power Consumption | <50mA@24V(4-20mA) |
| Warm Up Time | 3min |
| Response Time | <90s |
| Repeatability | <±10%FS |
| Weight | 140g |
| Storage | -40-70℃@20%-90%RH |
| Operating | -20℃-+60℃@15-80%RH |
| Shell Material | ABS |