2 MHz

Obstetric

Especially useful later in pregnancy (10-12 weeks and up), for use in labor, and in monitoring larger women.

3 MHz

Obstetric

Especially useful in confirming pregnancy (8-10 weeks), monitoring early in pregnancy, and monitoring smaller women.

4 MHz

Vascular

Aids in reading very deep vascular vessels.

5 MHz

Vascular

Aids in reading signals from moderately deep vessels.

8 MHz

Vascular

Useful for monitoring in tight areas, and in obtaining signals from peripheral and superficial vessels.

10 MHz

Vascular

For monitoring special superficial vessels.