| Counters, Timers, and Ratemeters | |
| 449 | Log/Lin Ratemeter |
| 449-2 | Log/Lin Ratemeter with audible output option |
| 661 | Ratemeter |
| 871 | Timer and Counter (non-printing) |
| 974A | CCNIM Quad 100-MHz Counter/Timer |
| 976 | Quad 250-MHz Counter /Timer |
| 978 | Dual Timer |
| 994 | CCNIM Dual Counter and Timer (requires interface option for computer operation) |
| 995 | CCNIM Dual Counter (requires interface option for computer operation) |
| 996 | CCNIM Timer and Counter (requires interface option for computer operation) |
| 99X-1 | 994, 995, and 996 Options - RS-232-C Interface Option (requires C-75 Cable) |
| 99X-4 | 994 and 995 Options - Internal +6 V Supply Option |
| 9349 | Log/Lin Ratemeter |
