Keithley:
| Model | Date | Group | Description |
|---|---|---|---|
| 135 | Digital multimeter | ||
| 147 | 1972 | Other | |
| 148 | 1975 | Analog multimeter | |
| 149 | Analog multimeter | ||
| 150 | Digital multimeter | ||
| 150A | 1964 01 01 | Analog multimeter | |
| 150AR | 1964 01 01 | Analog multimeter | |
| 150B | 1967 01 01 | Digital multimeter | |
| 150R | Digital multimeter | ||
| 151 | 1960 | Analog multimeter | |
| 153 | 1974 | Analog multimeter | |
| 155 | 1978 07 01 | Digital multimeter | |
| 160 | 1976 05 01 | Digital multimeter | |
| 1602B | 1975 | Digital multimeter | |
| 160B | 1975 | Digital multimeter | |
| 163 | 1976 05 01 | Digital multimeter | |
| 164 | 1974 | Digital multimeter | |
| 164TT | 1974 | Digital multimeter | |
| 165 | 1975 01 01 | Digital multimeter | |
| 168 | 1974 01 01 | Digital multimeter |
