Design and Development of a Low-Cost Milk Analyzer

Milk analyzer is a very useful instrument in the dairy industry. Feed is the principle cause of variation in the composition of fat, although several other factors are believed to influence. The fat concentration is most sensitive to dietary changes, followed by protein concentration; whereas the concentration of lactose, vitamins, Solid not fat (SNF), salts and other solid constituents do not respond to the dietary alterations. Analyzing the percentage of fat, SNF, protein and lactose are very important. There are two different type of milk analyzers are reported in this work. Both are low cost and user friendly milk analyzer. One is a milk analyzer using a constant phase element (CPE) sensor and it is a contact type. The other one is milk analyzer using ultrasound wave. The ultrasonic sensor is a noncontact type sensor. When ultrasound wave passed through the milk sample it is attenuated. The signal conditioning circuit is designed and the performance of milk analyzer is studied in this work. These two milk analyzers are inexpensive and easy to handle.