| ITE FLOWMETERS are basically those devices that | | | | By understanding the characteristics change of the |
| are mainly used to measure the rate of flow of a | | | | patterns of waves in the pipes or vibrating tubes, |
| particular gas or liquid. They can easily measure all | | | | you can easily correlate the rate of flow of the liquid |
| these substances generally in terms of the mass flow | | | | passing through the pipes or vibrating tubes. |
| rate or the volumetric flow rate.The volumetric flow | | | | Doppler shift and ultrasonic flow meters also use the |
| rate is basically expressed in m3/second. The mass | | | | changes that are truly caused to waves of sound |
| flow rate is basically expressed in kg/second. The | | | | mainly to correlate a flow rate for the liquid passing |
| flow meters have a number of applications. | | | | through the meter. |
| A peak flow meter is mainly used to measure the | | | | In ultrasonic flow meter, transmitters of ultrasonic |
| capacity of lung. This is mainly used by people with | | | | waves of sound are generally placed at the 2 ends |
| breathing problems or asthma and can be easily used | | | | of a tube where the finally measure is to being taken. |
| to determine if an attack of asthma is imminent. Flow | | | | Every transmitter do send a sound pulse. The two |
| meters are also used in number of industries, like the | | | | transmitters act generally as a receiver of the wave |
| water management, food processing industry, | | | | that is sent by the other transmitter. One sound |
| fabrication of semi conductor and also many others. | | | | pulse is sent in the direction against the flow of the |
| Flow meters are mainly classified by their applications | | | | liquid and the other is sent in the flow of the liquid. |
| or by the principal that governs their operation. For | | | | If all the constants are known about the metal of |
| example, mass flow meters is used to measure the | | | | the pipe or tube and the liquid passing through the |
| rate of flow of a medium in terms of it's own mass. | | | | pipe or tube, a flow rate can easily be derived from |
| However, there are also some other kinds of mass | | | | the time it takes each wave of sound to actually |
| flow meters that use various different techniques to | | | | reach the receiver. |
| take this measurement. | | | | Doppler shift type of flow meters use the changes in |
| One such example of this is the CORIOLIS flow | | | | the amplitude and frequency of a wave of sound |
| meter that generally uses the effect of CORIOLIS | | | | when it really bounces off particulate matter in the |
| to truly determine the mass of a liquid passing | | | | liquid that is being truly measured to determine the |
| through 2 pipes or vibrating tubes. | | | | rate of flow. |