The PM1604A/PM1604B are tiny professional dosimeters that are capable to measure the personal dose equivalent (DE) Hp(10) and personal dose equivalent rate DER Hp(10) of both gamma and X-ray radiation from 1 mSv/h up to 10 Sv/h within wide energy range and due to these parameters they can be applied by the specialists of nuclear-industrial complex and those who deal with intensive photon radiation sources.