Polypus: sonda de baixo custo para análise de parâmetros físico-químicos em águas superficiais

Abstract

The low availability in the market of low cost multiparameter probes that allow the data collection and access to its results in real time remotely, led to the development of this research. This work presented a contribution in the creation and implementation of an integrated system (hardware and software), called Polypus, which is based on the analysis of surface water through the use of temperature, pH, salinity, electroconductivity, dissolved oxygen and solid total dissolved in microcontroller platform, aiming its application in a water system to evaluate the results in its temporal and spatial variations. To meet the proposal, a prototype of an integrated system with sensors manufactured by the company Dfrobot in Arduino Mega platform was created. And finally developed a program to control the integrated system as well as storage / transmission of collected data. The research was carried out in the laboratory and samples of the evaluated waters from the mouth of the Buranhém River, the Mundaí River and the Bahia Waters and Sanitation Company (EMBASA). The Prototype also has a SIM800L GSM data transmission module, a micro-SD storage module, two external batteries, a shield sensor module and a LCD display. The data were obtained from the Polypus prototype and the Hanna HI 9828 multi-parameter probe. Short and longterm analyzes were performed and correlation graphs were used to show an analog behavior of the devices, demonstrating that there was no significant differences in results. The cost of the prototype was approximately R$ 1,500.00 versus the cost of a multiparameter probe that is approximately R$ 10,500.00. The results presented so far showed the reliability in the use of the prototype developed at low cost in the projects of environmental analysis