High temp, high pressure, explosion isolating target flowmeter

A high temperature and pressure flameproof target flow meter of the utility model includes a sensor (1), a lever (26), a flange (3), a cylinder elastic shaft seal diaphragm (10), a cylinder (7), a circle chamber (8) and a target slice (9). The upper end surface of the cylinder elastic shaft seal diaphragm (10) is arranged on the lever (26) and is welded with the lever (26) in a sealing way. The lower end surface of the cylinder elastic shaft seal diaphragm (10) is fixed with docking flanges (71, 72) in a matching and sealing way. The utility model has the advantages of structural property, sealing property and bearing ability, of which the high temperature resistance is improved greatly and achieves the requirement of flameproof standard.