Real-time apparent density measurement of the working fluid in outlet pipes of a steam-injection boiler. - Quansheng Duan; Lijuan Wang; Yong Yan 001; Shengjian Jiang; Jiaping Bi; Wenchao Li; Haiwen Du; Limin Yang; Shuai Zhang 006; Qiusheng Gao (I2MTC, 2013)