| Model | Type |
| EC-K1-PBT | Conductivity Electrode（k=1,Thermistor, platinum black |
| EC-K1-PT | Conductivity Electrode（k=1, Thermistor, platinum |
| EC-K01-PT | Conductivity Electrode（k=0.1, Thermistor), platinum |
| EC-K10-PBT | Conductivity Electrode (k=10, Thermistor), platinum black |