Nuclear concentration meter convenient to fix and install

The nucleon concentration meter comprises a base, a side plate is fixedly assembled at the right end of the upper side of the base, supporting rods are assembled on the front side and the rear side of the upper end of the side plate, a rotating shaft is rotationally assembled between the two supporting rods, an overturning plate is rotationally assembled between the rotating shaft, and a radioactive source is assembled at the left end of the lower side of the overturning plate. A signal amplifier is fixedly assembled in the middle of the interior of the base, a signal receiver is fixedly assembled at the lower end of the signal amplifier and electrically connected with the signal amplifier, a control module is fixedly assembled on the front side of the base and electrically connected with the signal receiver and the radioactive source, and a clamping mechanism is assembled in the middle of the upper side of the base; according to the scheme, the gear drives the racks on the two sides to move, the clamping pla