Ionometric measurements in the beams of linear accelerators can be carried out even at high pulse dose rates if one considers the ionic recombination within the ionization chamber. It is shown that this in turn provides the knowledge of the electron component collected in the chamber. We used a chamber developed for that very purpose, which allows a direct measurement of the electron component. Results up to a pulse dose of 1.1 × 10−2 C kg−1 (approximately 43 R) are presented.