| ABX Pentra Reference-E | 03610230005866 | HORIBA ABX SAS | Unknown class | |
| ADVIA Chemistry Reference Electrode | 00630414478654 | Siemens Healthcare Diagnostics Inc. | Unknown class | |
| Electrodes For Electrolytes And Biochemical Analyzers | 06975200381461 | Shenzhen Xilaiheng Medical Electronics Co.,Ltd. | Unknown class | |
| ISE Reference | 16438153000850 | Thermo Fisher Scientific Oy | Class B | |
| Lithium Electrode | 00630414451862 | Siemens Healthcare Diagnostics Inc. | Class C | |
| Rapidchem Reference Electrode | 00630414451893 | Siemens Healthcare Diagnostics Inc. | Class C | |
| Ref. electrode | 04980679110056 | JOKOH CO.,LTD. | Unknown class | |
| Ref. electrode | 04980679110315 | JOKOH CO.,LTD. | Unknown class | |
| Ref Electrode | 04560161906789 | Furuno Electric Co., Ltd. | Class A | |
| Ref Electrode-1 | 04560161906543 | Furuno Electric Co., Ltd. | Class A | |
| Reference electrode | 06936595774382 | MedicalSystem Biotechnology Co., Ltd. | Unknown class | |
| Reference Electrode | 00379497006438 | Medica Corporation | Class B | |
| Reference Electrode | 08426950038153 | Instrumentation Laboratory SpA | Class B | |
| Reference Electrode Kit | 16438153808456 | Thermo Fisher Scientific Oy | Class B | |
| Reference Electrode (REF) | 03701700828105 | VitalScientific | Class B | |