The Technical Department of Qingdao Prusi Electrical Equipment Co., Ltd. has once again sent good news that an ultra high precision iron carbon pressure drop instrument with a voltage drop resolution of 0.0000001MV and a resistance value of 0.0000001 micro ohms has been successfully developed recently. The accuracy reaches 0.01 level. *To solve the problem of insufficient accuracy and incorrect testing of the iron carbon pressure drop tester, this instrument has high accuracy, light weight, and is easy to carry. The host weight is only 7.5kg, and the instrument has passed the calibration and testing of the Electric Power Research Institute and the Metrology Institute.

During the pressure drop test of cathode assembly in electrolytic cells, the assembly pressure drop is very small, only a few tens of millivolts, especially in the welding quality test of steel bars and the welding quality tester of anode guide rods. Because the voltage drop at the welding point of the steel rod is about 1 millivolt when the testing current is low, the accuracy of early iron carbon voltage drop testers and anode guide welding quality testers was too low, with a display resolution of 0.1mV. It was impossible to measure accurate resistance and voltage drop. Some manufacturers improve this defect by increasing the testing current, but when the testing current increases, the volume and weight of the corresponding equipment increase exponentially, and the diameter and weight of the testing line increase exponentially, making testing a burden and greatly increasing the workload of frontline workers. Our company's new products, high-precision iron carbon pressure drop tester, high-precision steel bar welding quality tester, and high-precision anode guide rod welding quality tester, have solved all the above problems. Received great recognition and praise from users