The pressure fields of two different high intensity focused ultrasound (HIFU) transducers operated in burst mode were measured at acoustical power levels of 25 and 50 W (continuous wave equiva- lent) with three different hydrophones: A fiber-optic displacement sensor, a commercial HIFU nee- dle hydrophone, and a prototype of a membrane hydrophone with a protective coating against cavitation effects. Additionally, the fields were modeled using a freely available simulations soft- ware package. The measured waveforms, the peak pressure profiles, as well as the spatial-peak tem- poral-average intensities from the different devices and from the modeling are compared and possible reasons for differences are discussed. The results clearly show that reliable pressure meas- urements in HIFU fields remain a difficult task concerning both the reliability of the measured val- ues and the robustness of the sensors used: Only the fiber-optic hydrophone survived all four exposure regimes and the measured spatial-peak temporal-average intensities varied by a factor of up to 1.5 between the measurements and the modeling and between the measurements among them- selves.