Devices that are used in measuring the flow rate of a liquid or gas are called flow meters. The mass flow rate or the volumetric flow rate could be measured by these devices. Generally given, the volumetric flow rate is cubic meter per second. On the contrary, the flow rate mass is measured as kilogram per second. Know that there are many applications of flow meters. The peak flow meter could be used to measure the lung capacity of an individual. You can make use of this device if you have an asthma and also, you could use this to know if there is an imminent asthma attack. Flow meters could be used by industries such as in water management and food processing. An information will be given on how flow meters run. Here’s a good post to read about clamp-on ultrasonic flow meter, check this out!
The principal that is governing their operation or applications is what the categories of flow meters are based on. For example, mass flow meters are capable of measuring the flow rate of any medium in terms of their mass. You can get more info about differential pressure transmitter here.
In taking this measurement, there are some kinds of mass flow meters that are using different ways. An example would be a flow meter that is using an effect to know the mass of a fluid that is passing through two vibrating pipes or tubes. The vibrating pipes have changes in the characteristics of the patterns of the wave, so when you understand this, you could relate the flow rate of a certain substance that is flowing through it.
There are changes causing sound waves that you could relate to the flow rate of the medium which is flowing through the meter, and these changes are used by an ultrasonic flow meter. For an ultrasonic flow meter, there are two transmitters of ultrasonic sound waves that are put on the ends of the tube where the measurement takes place. A sound pulse is sent by each transmitter.
These transmitters are also acting as a receiver of the wave which was sent by the other transmitter. One sound pulse is following the flow of the liquid, so this is sent in that direction, and the other one is sent which is opposite of the flow. There would be a flow rate that could be derived from the time it would take each of the sound wave to be able to reach the receiver if there are different constants that are determined regarding in each of the metal of the tube and the gas or liquid that is flowing through the tube.
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