抚顺石油二厂南焦化装置于1964年投产时在焦炭塔壁安装了钴-60料位计,以测量焦位和泡沫层的变化,因钴-60具有放射性,对人体有害,且不易维护;1988年改用国外引进的中子料位检测系统。该系统对塔内含氢组分气体、泡沫、焦炭,可按相对氢浓度吸收中子能,反射回慢速的热中子。这些中子通过探测仪中的密封罐,使罐内氟里昂气体分子电离化。 Fushun Petroleum Plant South coking plant put into operation in 1964 when the coke tower wall installed cobalt-60 level gauge to measure the focal level and foam layer changes, due to cobalt -60 with radioactive, harmful to human body, and not easy to maintain; In 1988 the use of imported foreign material level detection system. The system of hydrogen components in the tower gas, foam, coke, according to the relative hydrogen concentration of neutron energy can be absorbed back to the slow thermal neutrons. These neutrons pass through the sealed tank in the detector to ionize the freon gas in the tank.