Electric connector used for connecting detection device with detection points

The utility model relates to an electric connector used for connecting a detection device with detection points. The electric connector used for connecting the detection device with the detection points comprises a cylinder-shaped main connector and a bypass connector. The main connector comprises a main housing and main contact members arranged in the main housing through insulators. Signal wires correspondingly connected with the main contact members are led into the main housing through a rear end of the main housing. The bypass connector comprises a bypass housing and bypass contact members arranged in the bypass housing. One end of the bypass housing is fixedly fitted in a circumferential direction of the main housing and is communicated with the main housing. The other end of the bypass housing is overhung to a radial periphery of the main housing. The bypass contact members and the main contact members are electrically connected in a one-to-one corresponding manner. In the switching between two differe