The Rosemount Analytical, Liquid Division, of Emerson Process Management announced that two of its technical staff, Chang-Dong Feng and Joshua Xu, have received the third place Gilmer/Thomason/Fowler (GTF) Award at the ISA 50th Analysis Division Symposium. The award is given annually to authors of the juried papers presented at the Symposium as determined by a committee of three Analysis Division members. Feng and Xu's paper "pH Independent Free Chlorine Sensor" was chosen from among 30 entries.
According to Mark Bleak, VP of operations at Rosemount Analytical, "We are very proud of C.D. and Joshua both for their receipt of this award and for addressing the issue of free chlorine measurement without the necessity of measuring pH. Process control professionals have had to make a choice when using free chlorine measurement. If they wanted to do without reagents, which is a significant savings of time and money, they had to purchase a pH sensor in order to assure that their free chlorine measurements were being taken at the same pH. This paper details a technology and methodology for eliminating the separate pH measurement."
As the Feng and Xu paper demonstrates, elimination of the pH dependence in chlorine measurement improves the accuracy of the measurement as compared to traditional technologies. There are reduced capital expenditures as there is one less sensor to purchase, and long term savings are also realized since less maintenance is required.
Chang-Dong Feng is manager of sensor technology for Rosemount Analytical Liquid Division. He was also the recipient of the GTF Award in 2001 for a paper on the design of trace dissolved oxygen sensors. Joshua Xu is senior chemist. More than 150 participants, mostly engineers and scientists, attended the ISA Analysis Division Symposium, held this year in Houston.
Source: Emerson Process Management
