Do You Know How A Liquid Flow Meter Works? A liquid flow meter is an instrument that measures the nonlinear, linear, volumetric or mass flow rate of a liquid. In simpler terms, it measures the amount of liquid passing through a particular structure. The units of measurement used in the case of liquid flow are gallons per minute, bushel per minute,http://www.veryshoes.us/, liters per second, cubic meters per second (cumecs) or acre-feet per day.How it worksA flow meter measures the liquid flow rate. The instrument can measure both mass and volumetric flow rates. The unit of measurement for volumetric flow is cubic meters per second and for mass flow it is kilograms per second.Mass flow rates are measured using the wave patterns produced when liquid is allowed to pass through a pair of tubes. Ultrasonic flow meters measure flow rates using transmitters that are fitted to either end of a tube. A burst of sound is produced and the interference in the sound wave is measured by the flow meter when it passes within the liquid that is present in the tube. The transmitters used are also receivers. Hence the time taken by a signal to reach the receiver on the other end can help determine the flow rate. TypesDifferent types of liquid flow meters based on various principles of physics have been developed. The various mechanical flow meters available are piston meter, rotameter, turbine flow meter,Nike Free Run, woltmann meter, single/multiple jet meter, paddle wheel meter, pelton wheel, oval gear meter and nutating disk meter. Pressure based meters which work on Bernoullis principle are venture meter, orifice plate,cheap nike free run 3, dall tube, pilot tube and multi-hole pressure tube. Optical flow meters use light to measure the flow rate and thermal mass flow meters use temperature sensors and heated elements in combination with each other. Vortex flow meters and open-channel flow measurement techniques are also in use. Electromagnetic, coriolis and ultrasonic meters are the latest additions to the list of flow measurement innovations. LDV or Laser Doppler Velocimetry is also a relatively new invention that uses laser diodes which are monochromatic to measure the liquid that is flowing through a particular structure.ApplicationsLiquid flow meters are used to measure lung capacity in asthma patients. Food and health organizations use it to measure liquids in the production of medicines and goods. Water flow meters are used in organizations associated with water supply and waste water management.