The invention relates to a system and method for wireless data transmission in an open process regime, for example a producing (or injecting) well associated with oil and gas production, the system comprising means for data acquisition, means for en data conversion, means for wireless data transmission, control means, power source, and a static pulse generation device adapted for generating static pressure fluctuations in the well fluid. The data conversion means are adapted to convert data to a simplified number format to be transmitted by the induced fluctuations in the process fluid.