[en] Different devices of determination of the centre of gravity of a charged particle beam (BGC) in an accelerator or storage ring chamber are described. They comprise: electrostatic electrodes, magnetoinduction transformers, emission transformers, ionization and acoustic transformers, transformers of the BGC position based on countercurrent flow measurement. The scheme of determination of beam position using synchrotron radiation is shown. The output characteristics of some monitors of the BGC position are presented