Digital Rotameters are the Industrial instruments that can be used in flow channels to measure the volumetric flow-rate in a closed pipe. These are made up of high precision components that are made up of corrosion resistant materials as they are in contact with water or other types of fluids. They consist of a rigid boy body with inlet, outlet connections and a metering float inside the body which moves due to the flow. These are provided with an electronic display which shows the rate of flow in numerical values as per the standardized calibrated units fitted inside the device. The robust and rigid construction of digital Rotameters allows them to easily operate in between the temperature range of 150 to 200 degree Celsius which make them suitable for high temperature liquids.