从一九六七年开始,长沙矿山研究院、凡口铅锌矿和铜陵铜官山选矿厂等单位在上海热工仪表厂研究所的协助下研制φ200毫米口径的矿用电磁流量计,于一九六九年实验室试制成功。经上海自动化仪表厂清水标定,精度达到1%。一九七○年在铜官山选矿厂进行工业试验,测量块矿中冲洗下来的泥矿浆(矿浆重量浓度20～30%,原矿含铁约30%,铜约1%,含硫约30%),流量40～60米~3/时,用浓密池 Starting from 1967, Changsha Mining Research Institute, Fankou Lead-Zinc Mine and Tongling Tongguan Mountain Concentrator and other units have developed φ200 mm mine electromagnetic flowmeters with the assistance of Shanghai Institute of Thermal Meter Factory 1969 laboratory trial success. Shanghai Automation Instrumentation plant water calibration, accuracy of 1%. In 1970, an industrial test was carried out in Tongguan Mountain Concentrator to measure the mud slurries (pulp weight concentration 20-30%, ore iron 30%, copper 1%, sulfur 30% ), Flow 40 ~ 60 meters ~ 3 / hour, with a thick pool