Calibratable and replaceable Harvard type pressure sensor and calibration, maintenance or replacement construction method thereof

The invention relates to a calibratable and replaceable Harvard pressure sensor, which comprises an upper backing ring, a lower backing ring and an elastomer assembly, and ring grooves are respectively formed in the lower end surface of the upper backing ring and the upper end surface of the lower backing ring; the elastomer assembly comprises a pair of half Harvard type elastomers, each Harvard type elastomer comprises a columnar cavity, a pressure bearing ring, a one-way valve, a plug, a right-angle connector and a pressure transmitter, an annular oil way is arranged in each cavity, an oil inlet and an oil outlet are formed in the outer side of each cavity, the one-way valve is installed at the oil inlet of each cavity, and the plug is installed at the end; the right-angle connector is mounted at the oil outlet of the cavity; the pressure transmitter is installed at the vertical upper end of the right-angle connector or on the wall face of the Harvard type elastomer; two half Harvardtype elastomers are inst