Plant (1) for manufacturing products, in particular a plant for applying a coating on parts, comprising a plurality of apparatuses (11, 12, 13) characterized in that it comprises: - at least a radiofrequency transmitting device (111, 112, 113), transmitting with a pre-set periodicity a radio signal containing at least a unique identifier, allowing to identify each apparatus (11, 12, 13); - at least a portable device (31, 32) carried by an operator (21, 22) receiving the signals transmitted by the radio-transmitting device (111, 112, 113) embedded in the apparatus (11, 12, 13); - at least a specific program (41, 42) loaded on and performed by said portable device (4) for extracting an univocal unique identifier of said apparatus (11, 12, 13) and detecting the distance operator-apparatus through the analysis of the trend of the radio signal; - the radio-transmitting device (111, 112, 113) being an electronic module operating according to the Bluetooth® standard, performing an active function of transmission kn
