<p>In this work, we investigate the electron transparency of graphene structure using well-established experimental techniques. We further compare the results to numerically obtained values and find excellent agreement between the two. We further analyze the dependency of graphene electron transparency on several physical parameters of the setup, including the width of the incident electron Gaussian wave packet, emitter barrier height, applied bias voltage, and the collector work function. The results indicate that the low work function of doped graphene can enhance electron transmission for lower kinetic energies. The measurements and calculations demonstrate that graphene exhibits high electron transparency even at low electron kinetic energies, for example with transmission above 90% at 12 eV. As a consequence, graphene promises to be a potential candidate for electronic and biological device applications based on electron emission. </p>