Capacitive differential pressure leakage measuring instrument

The utility model relates to the field of differential pressure measuring instruments, in particular to a capacitive differential pressure leakage measuring instrument which comprises a protective shell and a protective cover, the protective cover is arranged on the front face of the protective shell, a measuring connector is arranged on the front face of the protective shell, and a differential pressure measuring instrument body is arranged in the protective shell. Anti-collision blocks are arranged on the left side and the right side of the back face of the protective shell correspondingly, movable cavities are formed in the positions, located in the protective shell, of the inner sides of the anti-collision blocks, spring buffers are arranged in the movable cavities, and the spring buffers are connected with the anti-collision blocks through arc-shaped elastic pieces; compared with an existing capacitance type differential pressure leakage measuring instrument, the capacitance type differential pressure le