http://www.tek.com/keithley-source-measure-units/keithley-smu-2400-series-sourcemeter
Basically:
Its unfortunate 2500 series hasn't driven 2400 series down
| Series | Model | V res | I res | MSRP | Surplus low | Notes |
|---|---|---|---|---|---|---|
| 220 / LED | 220 | 500 fA | 850 Auction 61+ | |||
| 220 / LED | 224 | 480 | ||||
| 220 / LED | 225 | Analog programmable | ||||
| 220 / LED | 230 | 280 | ||||
| 220 / LED | 238 | 855 | ||||
| 2400 / VFD | 2401 | 3590 | ||||
| 2400 / VFD | 2400 | 4900 | 2800 | |||
| 2400 / VFD | 2400-LV | 4900 | ||||
| 2400 / VFD | 2400-C | 6600 | 5295 | |||
| 2400 / VFD | 2410 | 7080 | 4200 | |||
| 2400 / VFD | 2420 | 7500 | 3000 | |||
| 2400 / VFD | 2440 | 8230 | 6000 | |||
| 2400 / VFD | 2425 | 8580 | 2925 | |||
| 2400 / VFD | 2410-C | 8670 | 4200 | |||
| 2400 / VFD | 2420-C | 8740 | 3000 | |||
| 2400 / VFD | 2440-C | 9840 | 6000 | |||
| 2400 / VFD | 2425-C | 10200 | 2925 | |||
| 2400 / VFD | 2430 | 12500 | 8000 | |||
| 2400 / VFD | 2430-C | 14300 | ||||
| 2450 / touchscreen | 2450 | 5400 | 4750 | |||
| 2450 / touchscreen | 2460 | 7500 | 5500 | |||
| 2450 / touchscreen | 2461 | 8500 | ||||
| 6220 | 6220 | 4050 | 5000 | |||
| 6220 | 6221 | 5390 |
Other current sources