Characteristics Study of Capacitive Sensor to Identify Native Breed Cow Milk

The predominant genotype in Indian native breeds of cows and buffaloes is A2A2, meaning they produce A2 milk. Cow milk has calcium, phosphorus, rich fats, potassium which helps to maintain blood pressure. This work focuses on the capacitive sensor method to identify the native breed cow milk from different varieties of milk. The milk variety taken for study are Holstein Friesian(HF), Girr, Jersey and Native breed. This study is carried out using parallel plate capacitor and cylindrical type capacitor. The parameters taken for study are capacitance, magnitude and phase value for both the type of capacitors. The results show that parallel plate capacitor characteristics provides differentiation of milk samples in capacitance at 1kHz frequency and in magnitude values of impedance at 100Hz and 120Hz frequencies. The characteristics of the cylindrical capacitor shows clear identification of native breed in magnitude of impedance at all the frequency from 100Hz to 100kHz but in capacitance value the difference is very low at all the frequency range. Hence, by considering capacitance as a parameter, parallel plate capacitor characteristics provide better results at 1kHz frequency compared to the cylindrical capacitor.