Study on the Freshness of Apple using Electrical Property - A Non-Destructive Method

The aim of the work was to test the freshness of apples using non-destructive sensing methods. Among the various electrical methods available, the dielectric capacitance method was chosen for this study. The experimental set up for the capacitance measurement was developed and it consists of two aluminum plates which act as parallel plates, and a stand which acts as a holding system. The apple is placed between the two aluminum plates, and an input voltage of 10 V dc is applied to the plates. The entire test is carried out at ambient temperature (30±3 °C). The capacitance value was recorded and a correlation between the capacitance and the condition of fruit was obtained.