Jinan weighing sensor elastomer minor changes occurred when the load acting on the electronic weighing sensor, the sensor elastomer minor changes occur, so that the elastic body attached to the resistance strain gauge resistance to change, alter bridge balance. The output voltage changes, the change of the voltage signal through the high-speed high-precision A / D converter into a digital signal, the digital signal via acquisition, a wireless transmitter (or cable) to the secondary instrument inside. The obtained secondary instrument calibration signal for data processing, the weight value corresponding to the display, but also a printer, if necessary, can be transmitted to a computer management system. ⑴ common electronic weighing types are: truck scale, railway scale, belt scale, electronic crane scale, electronic platform scales (buffered), quantitative packing scale, quantitative filling scales, sorting scale, computer combination weigher, driving scales, pricing scales, weighing scales, barcode scales, counting scales, cash register scales and so on. ⑵ reading from the explicit form can be divided into direct, wired control box displays, large screen display and wireless transmission instrument display four kinds; formal from the sensors can be divided into resistive strain gauge, pressure magnetic, piezoelectric and Capacitive four kinds; resistance strain most commonly used. From the use of the environment is divided into normal type, high temperature, low temperature, magnetic insulation and explosion proof; stabilization from the data processing can be divided into static type, quasi-dynamic model and the dynamic type of three; currently used for the static and quasi-dynamic model, the dynamic model is still in the development stage. ⑶ from sensor mechanical structure can be divided into bridge sensors, cantilever sensors, box beam sensors, Spoke sensor ring sensor board, Column Sensor, S-type sensors, double shear beam sensor, sales shaft sensor, sensors, etc. fish back.