Parameters
| Model | Description | Sensitive Membrane Description | Measurement Range | Temperature Range | Reference Electrode | 
| 7801 | Na+ electrode | Glass membrane | 1~7 pNa (10-1~10-7 mol/L) | 15~45 ℃ | Model 6212 | 
| CA502 | Ca2+ electrode | Long-life PVC membrane | 1~5.3 pCa (10-1~5×10-6mol/L) | 5~60 ℃ | Model 6211 | 
| K502 | K+ electrode | Long-life PVC membrane | 0~6 pK (1~10-6mol/L) | 5~60 ℃ | Model 6215 | 
| NO502 | NO3 - electrode | Long-life PVC membrane | 0~5.2 pNO3 (1~7×10-6mol/L) | 5~60 ℃ | Model 6215 | 
| NH502 | NH4 - electrode | Long-life PVC membrane | 0.3~4.3 pNH4 (0.5~5×10-5mol/L) | 5~45 ℃ | Model 6215 | 
| 601 | Ca2+/Mg2+ combination electrode | PVC membrane | 1~5 pCa/Mg (10-1~10-6 mol/L) | 5~60 ℃ | / | 
| F501 | F- combination electrode | Single Crystal | 1~6 pF (10-1~10-6 mol/L) | 5~45 ℃ | / | 
| F502 | F- electrode | Single Crystal | 1~6 pF (10-1~10-6 mol/L) | 5~45 ℃ | Model 6211 | 
| CL502 | Cl- electrode | Solid-state | 1~4.3 pCl (10-1~5×10-6 mol/L) | 5~60 ℃ | Model 6215 | 
| BR502 | Br- electrode | Solid-state | 1~5.3 pBr (10-1~5×10-6 mol/L) | 5~60 ℃ | Model 6215 | 
| I502 | I- electrode | Solid-state | 1~6.3 pI (10-1~5×10-7mol/L) | 5~60 ℃ | Model 6215 | 
| CU502 | Cu2+ electrode | Solid-state | 1~6.3 pCu (10-1~5×10-7mol/L) | 5~60 ℃ | Model 6215 |