A multivariable process fluid transmitter module comprising: a base having a pair of recesses (217, 219), a pair of pedestals (218, 220), each pedestal being disposed in a respective recess (217, 219) and being coupled to a respective isolation diaphragm and configured to receive a pressure of a process fluid as a line pressure and configured to be bearing high pressure up to at least 103.4 MPa (15,000 psi); at least one line pressure assembly (302, 304) mounted proximate one of the pedestals (218, 220), the at least one line pressure sensor assembly (302, 304) coupling a respective isolation diaphragm to a first line pressure sensor; a differential pressure sensor having a sensing diaphragm fluidically coupled to the isolation diaphragms by a fill fluid; at least one additional sensor disposed to sense a variable of the process fluid; circuitry coupled to the first line pressure sensor, the differential pressure sensor, and the at least one additional sensor to measure an electrical characteristic of each of the first line pressure sensor, the differential pressure sensor, and the at least one additional sensor; and wherein the circuitry is configured to provide an output related to the first line pressure sensor, the differential pressure sensor and the at least one additional sensor, wherein the at least one additional sensor comprises a second line pressure sensor positioned at a second line pressure assembly, and wherein the second line pressure sensor is sealed in a vacuum or near vacuum instead of being coupled to line pressure, so that it reacts to non-pressure-related variables, such as temperature and/or stresses on the sensor module. a base having a pair of recesses (217, 219), a pair of pedestals (218, 220), each pedestal being disposed in a respective recess (217, 219) and being coupled to a respective isolation diaphragm and configured to receive a pressure of a process fluid as a line pressure and configured to be bearing high pressure up to at least 103.4 MPa (15,000 psi); at least one line pressure assembly (302, 304) mounted proximate one of the pedestals (218, 220), the at least one line pressure sensor assembly (302, 304) coupling a respective isolation diaphragm to a first line pressure sensor; a differential pressure sensor having a sensing diaphragm fluidically coupled to the isolation diaphragms by a fill fluid; at least one additional sensor disposed to sense a variable of the process fluid; circuitry coupled to the first line pressure sensor, the differential pressure sensor, and the at least one additional sensor to measure an electrical characteristic of each of the first line pressure sensor, the differential pressure sensor, and the at least one additional sensor; and wherein the circuitry is configured to provide an output related to the first line pressure sensor, the differential pressure sensor and the at least one additional sensor, wherein the at least one additional sensor comprises a second line pressure sensor positioned at a second line pressure assembly, and wherein the second line pressure sensor is sealed in a vacuum or near vacuum instead of being coupled to line pressure, so that it reacts to non-pressure-related variables, such as temperature and/or stresses on the sensor module.