Compact, portable device which employs radio frequency (RF) to make uniform, quality seals on a variety of tubing sizes without power adjustment by the user. The Power Source consists of the Model 2600 Power Source (“the Power Source”) and the Model 1105, a handheld, manually-activated sealing head or the Model 2605, a bench-top automatic sealing head (“the Sealing Head”) which creates a seal that is formed by the sealing head jaws in such a way as to make segment separation easy and uniform.