| Name | Description |
|---|---|
| Constant source of pure substance | |
| Ideal gas substance with defined partial pressure | |
| Constant source of substance molality | |
| Constant source of molar concentration | |
| Constant source of substance mole fraction | |
| Constant source of electro-chemical potential | |
| Molar pump of substance to system | |
| Molar pump of substance out of system | |
| Physiological Clearance | |
| Degradation of the substance | |
| Source of substance bounded to constant amount of buffer to reach linear dependence between concentration and electrochemical potential | |
| Molar pump of substance at defined temperature to system |