| Model | Frequency | Application |
| S3 (HP21311A) | 1.6 to 3.2 MHz | Wideband Adult Cardiac Transducer - Difficult Patients |
| S4 (HP21330A) | 2.0 to 4.0 MHz | Wideband Adult Cardiac Transducer |
| S12 (HP21380A) | 5.0 to 12 MHz | Wideband Pediatric Cardiac Transducer |
| 7.5 Trap (HP21258B) | 5.5 to 7.5 MHz | Wideband Peripheral Vascular Transducer |
| L11-3 (HP21356A) | 3.0 to 11.0 MHz | Wideband Adult & Pediatric Superficial Transducer |
| TEE (HP21364/67/69A) | 3.7 to 5.0 MHz | Wideband Adult Transesophageal Transducer - Omni-plane |
| TEE (HP21366A) | 5.5 to 7.5 MHz | Wideband Pediatric Transesophageal Transducer - Bi-plane |
| TEE (HP21378A) | 2.0 to 7.0 MHz | Wideband Adult Transesophageal Transducer - (Specialty) |
| Aux CW | 1.9 MHz | Non-Imaging Adult/Pediatric Intercostal/Suprasternal/Subcostal Access |
