Flow meter is an instrument used to measure flow rate of liquid as well as gas in industrial settings. It can be used majorly for liquids and gases, such as fuel, oxygen, water, oil, etc. In comparison with conventional flowmeter, a digital flow meter has benefits such as digital display, switch, and analog output; readings that are unaffected by orientation; installation position, and pressure variation. Depending on the type and size of the meter, the key features like flow range vary. It can display the level of flow in gallons, liters or other user defined units.