DESIGN AND FABRICATION OF AN ONLINE LOW-COST MONITORING AND WARNING SYSTEM FOR TEMPERATURE AND pH OF WATER

Thanh Van Pham, Dat Tien Nguyen, Bai Xuan Dang, Phong Thi Nguyen, Hoang Van Vi

Abstract


In this study, an online low-cost monitoring and warning system for pH and temperature of water is presented with the design and construction described in detail. This system was constructed based on the low cost 8-bit Microcontroller Atmega 16 and sensor node for real time monitoring. The pH and temperature of water were measured in-pipe and on-line. This system is suitable to measure pH in the range from 2 to 10 and temperature from 0 to 90 oC. The accuracy of pH and temperature was estimated about ±0.1 and ±0.32 oC, respectively. These measured parameters were successfully uploaded to thingspeak.com through GPRS service in real time. Specially, these parameters were automatically evaluated based on QCVN 01:2009/BYT standard for tap water. If one of measured parameters was out of standard ranges, a warning SMS message was sent to the selected mobile number. The obtained results showed that the fabricated system is stable for longtime with reliable results. Because of low-cost, good accuracy and on-line measurement, this system is suitable for monitoring multiparameters of water in real time.

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References


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