An On-Line Multiparametric Water Quality Monitoring System Based on Visible Spectrophotometry



Water quality monitoring plays an important role in contamination control and environment protection. This paper describes an on-line multiparametric water quality monitoring system based on visible spectrophotometry, which combines embedded technology with GPRS telecommunication technology. This system can realize online wireless monitoring to concentrations of chromium (Cr), plumbum (Pb), A surfactant (AS), chemical oxygen demand (COD), ammonia nitrogen (AN), total phosphorus (TP) and total phenol (TPh) in real time. The mechanical structure, hardware circuit and software design of the system are completed. The absorption spectrums of pure water and MB-SDS complex have been measured. Preliminary experiments using a model machine show that each mechanism of the system runs well. Moreover, the monitor possesses many advantages, such as high degree of automation, high reliability, high efficiency, compact structure, small size, and so on.




Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang




H. Y. Liao et al., "An On-Line Multiparametric Water Quality Monitoring System Based on Visible Spectrophotometry", Advanced Materials Research, Vols. 189-193, pp. 2801-2804, 2011


February 2011




[1] Tor, F., et al., Design of a virtual instrument for water quality monitoring across the Internet. Sensors and Actuators B: Chemical 76, 281–285. (2005).

[2] Tseng, C.L., et al., Feasibility study on application of GSM-SMS technology to field data acquisition. Computers and Electronics in Agriculture 53, 45–59. (2006).


[3] Xiuna Zhu, Daoliang Li, et al., A remote wireless system for water quality online monitoring in intensive fish culture, Computers and Electronics in Agriculture 71S (2010) S3–S9.


[4] Skoog, et al., Principles of Instrumental Analysis. 6th ed. Thomson Brooks/Cole. 2007, 169-173.