Transducers, water quality, integrated circuits
A prototype system has been developed for recording and transmitting digital data at a remote water quality monitoring station in an unattended manner. As many as eight analog signals from transducers, which measure water quality characteristics such as dissolved oxygen, temperature, pH, chlorides, conductivity, redox, and turbidity, are converted to digital signals and recorded in binary coded decimal format on magnetic tape. This unit may be contacted from a central station for playback of the day's recording. The transmitted data can be recorded at the central station by teletype. Each data record includes a time-of-day "word" so that all data is identifiable. The techniques developed during this contract period have possible application in many areas of water resource research, particularly for use in making water quality measurements in remote areas or at numerous sites reporting to one central station.
Testerman, M. K.. 1970. Digital Systems for On-Site Collection for Water Quality Analysis. Arkansas Water Resources Center, Fayetteville, AR. PUB008. 67