The objective of the project is to create a low-cost, tropicalized, and rugged sensor that is capable of testing the impurities in water.
Explanation
The sensors developed are for ionic contaminants and for some physical parameters for quality testing of water. Some basic techniques are used during the testing such as potentiometry where the changes in the potential of the electrodes are detected by the potentiometric sensor. Another technique is conductometry where the changes in conductance between two electrodes are detected by the conductometric sensor.
This specific version contains microcontroller based conductometry system. It operates with low power with requiring only 6V batteries. It has real-time clock and 20x4 LCD display. The unit has the MSP430F449 microcontroller with 64KB flash memory as well as 8-channel 12-bit ADC for 8 different parameters. For pH and Analytes, there are 2 separate PI controllers and the direct readout of parameters values are provided with 1 decimal precision. The Enter and Abort keys are user friendly interface and uploading is made through Serial Data.
The current instrument can measure more parameters and more sensors were also developed. A pocket pen version prototype was also made.
S:www.circuit-projects.com
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