Improved electrode protection bottle and table type PH measuring instrument

The utility model discloses an improved electrode protection bottle and a table type PH measuring instrument, relates to the technical field of chemical measuring instruments, and aims to provide a novel structure which integrates a bottle cap and a bottle body and omits the step of frequent disassembly. The improved electrode protection bottle comprises a connecting piece and a lock cap, the connecting piece and the lock cap are both of a pipe structure. The connecting piece comprises a first connecting part and a locking part; the lock cap comprises a second connecting part and a shifting part; the lock cap is arranged outside the connecting piece in a sleeving manner, the first connecting part is opposite to the second connecting part, and the locking part is opposite to the shifting part; the first connecting part is connected with the bottle body; the outer wall of the locking part is an elliptical wall surface, and the diameter of the inner wall of the locking part is consistent with that of the measuri