Design and experiment on the dialysate pH value and electrical conductivity measuring instrument 
Liu Zhi-bin, Song Wen-xiao, Yang Jing-juan, Zhu Yi-heng, Lu Guang-wen
Chinese Journal of Tissue Engineering Research . 2012, (21): 3924 -3928 .  DOI: 10.3969/j.issn.1673-8225.2012.21.029