| Instrument | Investigator | |
| ACE - Advanced Composition Explorer (Mission) | E. C. Stone - Caltech | |
| CRIS - Cosmic Ray Isotope Spectrometer | ||
| EPAM - Electon, Proton, and Alpha Monitor | ||
| MAG - Magnetometer | ||
| SEPICA - Solar Energetic Particle Ionic Charge Analyzer | ||
| SIS - Solar Isotope Spectrometer | ||
| SWEPAM - Solar Wind Electon, Proton, and Alpha Monitor | ||
| SWICS - Solar Wind Ionic Charge Spectrometer | ||
| SWIMS - Solar Wind Ion Mass Spectrometer | ||
| ULEIS - Ultra Low Energy Isotope Spectrometer |