Rotameter is also a kind of flow meter used in various industries to measure the flow. Due to the working principle and functionality the Rotameter is also called as Variable area flowmeter. There are various types of rotameters are manufactured such as glass tube rotameter, acrylic rotameter, metal tube rotameter and bypass type rotameter. Measuring Air, Gas, liquid, oils and other similar fluids are possible by using the Rotameters. The construction, ease of use and the lesser price makes the Rotameter exists in the industrial flow measurement.