Pressure transmission cylinder with proximity switch

The utility model discloses a pressure transmission cylinder with a proximity switch, which comprises a cylinder body, two ends of the cylinder body are sealed through end covers, a rodless piston is arranged in the cylinder body, each end cover is provided with an input pipe and an output pipe, and the input pipe and the output pipe are provided with electric control valves. The limiting sensor comprises a proximity switch and a movable ejector pin, a detection through hole is formed in the end cover, the front end of the movable ejector pin protrudes into the cylinder body from the detection through hole, a spring and a spring pre-tightening threaded sleeve are arranged in the detection through hole, the two ends of the spring abut against the spring pre-tightening threaded sleeve and the movable ejector pin respectively, and the proximity switch is installed on the spring pre-tightening threaded sleeve. And a sealing ring sleeved outside the movable ejector pin is arranged in the detection through hole. Th