| 10108 |
| Tektronix | 2182A/J | Keithley low-level | Tektronix, Keithley Nanovoltmeter Model 2182A, 2182A/J, 1nV-100V |
| 10109 |
| Tektronix | 6220 | Keithley low-level | Tektronix, Keithley Ultra-sensitive Current Sources Series 6200 6220 |
| 10111 |
| Tektronix | 6485/J | Keithley low-level | Tektronix, Keithley Series 6400 Picoammeters 6485/J, 2nA-20mA |
| 10112 |
| Tektronix | 6487/J | Keithley low-level | Tektronix, Keithley Series 6400 Picoammeters 6487/J, 2nA-20mA |