Abstract: The RAD transducer comprises a sensor (1) for measuring physical quantities, a power supply section (7), a clock section (2), a timing section (4,5) and a circuitry for the acquisition of a measurement and its frequency conversion for transmission. This acquisition circuitry includes a microcontroller (11), a memory (14) containing compensation parameters used in a calibrating process an analogue/digital converter (13) for converting analogue measurement delivered by the main sensor (1) in a digital form adapted to be processed by the microcontroller (11), a temperature sensor (15) converting a temperature value into a voltage value, an analogue/digital converter (16) for converting the analogue measurement given by the temperature sensor (15) into a digital form adapted to be processed by the microcontroller (11), and frequency generating meads (17) for generating the signal to be transmitted on the line through the power supply section.