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Rosemount’s 3051T pressure transmitter integrates sensor, electronic technology and single isolation diaphragm design to achieve the calibration range of gauge pressure and absolute pressure measurement from 0.3 to 10,000 psi. The working principle of the 3051T pressure transmitter: When working, the isolation diaphragm and filling fluid on the high and low pressure sides transfer the process pressure to the filling fluid, and then the filling fluid transfers the pressure to the sensor diaphragm in the center of the sensor. The sensing diaphragm of the 3051 pressure transmitter is a tensioned elastic element whose displacement changes with the pressure (for the 3051GP pressure transmitter, the atmospheric pressure is the same as applied to the low pressure side of the sensing diaphragm). 3051AP absolute pressure transmitter, the low pressure side always maintains a reference pressure. The maximum displacement of the sensing diaphragm is 0.004 inches (0.1 mm), and the displacement is proportional to the pressure. Capacitor plates on both sides detect the position of the sensing diaphragm. The difference in capacitance between the sensing diaphragm and the capacitor plate is converted into a corresponding current, voltage or digital HART (High Speed Addressable Remote Transmitter Data Highway) output signal.