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兰化公司自动化研究所研制的FSMA型γ射线工业密度计于八二年底通过省级鉴定。该仪表采用了稳定化电路、可控高压电源、线性化电路、开机予置等先进技术,使以闪烁计数器为探测器的γ射线密度计精度达0.5mg/cm~3。经上海吴泾化工厂、兰化合成橡胶厂、金川有色金属公司研究所、兰州自来水公司第一水厂等现场应用考核,证明性能可靠,重复性好,主要技术指标达到国外同类仪表的先进指标。经放射卫生防护部门检验,仪表周围γ射线照射量远远低于国家规定。
Lanzhou Institute of Automation developed FSMA-type gamma-ray industrial density meter at the end of 1982 passed the provincial appraisal. The instrument uses a stabilization circuit, controllable high-voltage power supply, linearization circuit, boot to set the other advanced technology so that the scintillation counter detector γ-ray density meter accuracy of 0.5mg / cm ~ 3. The Shanghai Wujing Chemical Plant, Lanhua Synthetic Rubber Factory, Jinchuan Nonferrous Metals Company Institute, the first water plant in Lanzhou Water Field and other field applications assessment to prove reliable performance, good repeatability, the main technical indicators have reached the advanced indicators of similar foreign instruments. Radiation protection departments tested, gamma radiation exposure around the instrument is far below the state regulations.