You Do Need power plug adapter while traveling from Sint Maarten to Senegal.

Here is Why You Need An Adapter

The outlet and plug type used in Senegal are C, D, E and K and in Sint Maarten are A and B. This is how they look like.

Sint Maarten

In Sint Maarten, outlets of type A and B are in use.

Type A

Type B

Senegal

In Senegal, outlets of type C, D, E and K are in use.

Type C

Type D

Type E

Type K