| Subject | English | German |
| meas.inst. | unifilar electrometer | Einfadenelektrometer (version of string electrometer) |
| phys. | unifilar electrometer | Einfadenelektrometer |
| meas.inst. | unifilar Wulf version of Wulf string electrometer | Einfadenelektrometer nach Wulf |