Three-post variable cross-section digital sensor

The utility model relates to a three-post variable cross-section digital sensor belonging to a technical field of measuring force and weighing, in particular to a resistive strain gauge transducer. An upper ram 1 is fixed to an elastic body core 6 whose upper part is fixed to a cable connector 2. Coating components 3 are provided outside the elastic body core whose lower part is fixed to a stop rod 4. A lower ram 5 is fixed below the elastic body core. The elastic body core consists of an upper supporting body 61 and a lower supporting body 62 through a fixed connector 63. A foil gage 64 is provided in the strain zone of the three-post variable cross-section. The utility model has advantages of novel structure. Stress concentration and a structure of three-post variable cross-section in the strain zone are provided with the elastic body core. Thus, the working state of the utility model is more stable with good load characteristics of drawing and pressing.