摘要：This article presents the construction of a low-cost LVDT sensor to be installed in several different parts of a plantation and, with this configuration, allow the agriculturalist and specialist the appropriate moment to invest in culture. The article includes the basic concepts LVDT sensors and phytomonitoring and the importance of water for plant development, together with its correlation with the variation of the stem. The justification here presented for the construction of an LVDT sensor of low cost is the possibility of using several sensors in the plantation and thus be able to seek spatial variation of water. The methodology shows the materials used and also the several stages of the construction (spool, windings, capsuling, nucleus and fixation), as also the trials performed to validate it. In the results, we draw attention to the equation of the constructed sensor, which could be used in a system for data acquisition and analysis (datalogger). As a conclusion, we see that the sensor as proposed in this study showed the construction characteristics of an LVDT with a linearity region and characteristic curve which are analysed according to the Pearson coefficient.
