| model | Product Description | Electrode plug |
| Type 217-01 Reference Electrode | Calomel double salt bridge form | U-shaped insert (Φ12Ã120) |
| Type 217 reference electrode | Calomel double salt bridge form | Large insert (Φ10Ã180) |
| Type 218 reference electrode | Silver/silver chloride single salt bridge type | U-shaped insert |
| C (K 2 SO 4 )-1 type reference electrode | Mercury sulfate single salt bridge type | U-shaped insert |
| Type 6802 Reference Electrode | Calomel single salt bridge form, the filling liquid is 0.1mol/L KCl | U-shaped insert |
| Type 6802-01 reference electrode | Calomel single salt bridge form, the filling liquid is 3.8mol/L KCl | U-shaped insert |
| 6802A reference electrode | The filling liquid is 3.8mol/L KCl | / |
| Type 212 reference electrode | Calomel single salt bridge form | U-shaped insert |
| D-type reference electrode | Calomel single salt bridge form | U-shaped insert |
| Type 232 reference electrode | Calomel single salt bridge form | U-shaped insert |
| 320 reference electrode | / | / |
| Special reference electrode for soil | With temperature compensation function, including 1 extension rod | / |