The continuous expansion of technology has catered to humans with numerous benefits in the form of inventions. Similarly, the increasing need for precise and exact measurements for various purposes especially by industries, factories and companies have led the engineers to invent innovative measuring tools. These measuring instruments can now go to the extent of giving true value when operated under certain conditions. To meet many such requirements of the industries and factories Liquid flow meters were introduced. Since their invention, liquid flow metes have progressed in many aspects. From the accuracy of results to their applications in a wide range of fields, liquid flow meters are in a continuous state of development.\r\n\r\nLiquid flow meters are basically used to measure the rate of change of flow of a liquid or gas passing through the pipe. There are different types of flow meters available in the market. Each type is different in its construction using the best possible fluid dynamics principles, so as to serve a wide range of purposes. With technical features specific to each type, every flow meter is used for particular purposes which generally depend on the type of liquid and the area of application.\r\n\r\nBenefits through Wide-Range Applications\r\n\r\nThe varying types of flow meters have different areas of applications. The prime areas of applications are:\r\n\r\nEngineers have worked their best and have made liquid flow meters that are able to resist nature\u2019s variable conditions such as outdoor temperature and pressure. Now we have liquid flow meters that can tolerate different weather conditions and give accurate results.\r\nAlong with giving accurate values flow meters are also used in control of the flow of liquid generally in conjunction with a Control Valve. They are able to direct the fluid and normalize the velocity and hence maintain the required pressure level.\r\nBesides industrial use, liquid flow meters are also used in housing projects. They are used to know the amount of water utilized by the houses.\r\nIn various industries flow meters are used to evaluate the quantity of the fluid so as to control the velocity and its use at the same time.\r\nLiquid flow meters are also used to save water from wastage by detecting the leakage areas.\r\nIndustries that Benefit from Liquid Flow Meters\r\n\r\nThere are numerous industries in which flow meters are the essential instruments and benefit with their various applications. Some of the industries are:\r\n\r\nFuel Industry\r\nPetrochemical Industries\r\nOil Industry\r\nChemical Industry\r\nPharmaceutical Industry\r\nPaints, grease and coating Industry\r\nFood and Beverages Industry\r\nPlus these meters are used in universities of engineering and science to serve educational and learning purposes.\r\nBenefits of Liquid Flow Meters Particular to Type\r\n\r\nAs already discussed there are many types of liquid flow meters. Some of the most widely used are Electromagnetic Flow meters, Ultra Sonic Flow Meters, Coriolis Mass Flow Meters, Thermal Mass Flow Meters, Differential Mass Flow Meters, Variable Area Flow Meters, Turbine Flow Meters, Vortex Flow Meters, Swirl Flow Meters, Venturi Fumes, Oval Gear Flow Meters, Oscillating Piston Flow Meters, Weirs, Lobed Impeller Flow Meters. Here we are going to discuss some of key benefits or advantages of some of these flow meters which that more commonly used.\r\n\r\n\u00b7 Differential Pressure Flow Meters:\r\nPressure drop for nozzles is low.\r\nIt has the capabilities to withstand the worst conditions of liquid.\r\nSuitable for gases, steam, and\r\nIt gives you the facility to change range.\r\nAppropriate for high pressures and temperatures.\r\n\u00b7 Electromagnetic Flow Meters:\r\nThe foremost advantage is there are fixed parts.\r\nCan bear changes in density, viscosity, temperature and electrical conductivity.\r\nThe measured variable and flow rate shows a linear\r\nContamination doesn\u2019t affect the meter.\r\nIt easy to maintain with low maintenance cost.\r\nCapable of operating in both directions.\r\n\u00b7 Coriolis Flow Meters:\r\nCan give accurate measurements of mass flow.\r\nIt is capable of self-draining.\r\nAlso able to give density, and temperature measurements.\r\nAllows bidirectional flow of liquid.\r\nOne can set measuring range according to flow rate and density.\r\n\u00b7 Ultrasonic Flow Meters:\r\nIt has no moving parts.\r\nConcentration, temperature, and density don\u2019t affect the transit time meters.\r\nIt has low maintenance.\r\nNo extra pressure drop.\r\nMeasured variable and flow rate has a linear\r\nNo obstructed flow channel.\r\nAppropriate options for materials.\r\n\u00b7 Thermal Mass Flow Meters:\r\nIt gives high accuracy in measurements.\r\nIt has a low-pressure\r\nIt also has no moving parts.\r\nSterilization of this meter is easy.\r\nQuick response time.\r\nCan directly measure gas mass flow.\r\n\u00b7 Turbine Flow Meters:\r\nRotating vane and Woltman meters need no external power supply.\r\nIt can bear high pressures and temperatures.\r\nIt is also appropriate for liquids like Cryogenic liquids.