Screen mesh sensor

The utility model relates to a silk screen sensor which comprises a body, a moving assembly and a take-up and pay-off assembly, the body is used for being arranged in a channel, the moving direction of the body is parallel to the flowing direction of fluid in the channel so as to measure two-phase flowing parameters of the fluid, and the body is connected with a wire harness; the moving assembly is connected to the body and used for driving the body to move in the channel in the flowing direction of the fluid. The take-up and pay-off assembly comprises a take-up rod and a first driving source, and the wire harness is spirally wound on the take-up rod; in the process that the body moves towards the side deviating from the take-up rod in the flowing direction, the first driver is used for driving the take-up rod to rotate around the first rotating direction so as to release the wire harness; in the process that the body moves towards the side close to the take-up bar in the flowing direction, the first driving