![]() ![]() ![]() These meters mainly include paddlewheel, turbine, electromagnetic, vortex shedding & sonic or ultrasonic flow meters. These meters are less sensitive when the internal liquid movement is higher. This meter is used to measure the velocity of the stream to analyze the volumetric rate of liquid flow. These are very popular due to their simple design & less cost. At present 40% of these meters are used in industries to measure different fluids like gases, highly thick liquids. The difference in the differential pressure can be measured to decide the liquid flow rate. This meter works on incompletely blocking the flow of liquid within a pipe to create a disparity in the static pressure among the up & downstream part of the device. These are weight-oriented meters used where weight oriented measurement is required like in chemical industries. This type of meter is used to provide an estimated flow rate to the consumer by measuring the volume of the substance flowing through them. These meters give high accuracy & good repeatability and they do not need a power supply for their function and straight-up & downstream pipe for their installation. Each meter includes its distinct mechanism to count liquid volumes in a specific no. Flow measurement can be obtained by counting the no. The PD ( positive displacement) flow meters work by counting or isolating identified volumes of a gas or liquid. mechanical-type-meter Positive Displacement Flow Meter These meters are classified into four types which include the following. These types of meters measure the flow of liquid with the help of moving parts arrangement, known liquid volumes through a sequence of chambers or gears. These are classified into different types based on its application like a mechanical, optical and open channel. In many cases, the flow of mass is the main consideration, particularly in gases selling/buying, chemical reactions, combustion, etc. The flow of mass can be calculated by using this formula like ṁ = Q ∗ρ (Q = the flow rate of liquid & ρ is the density of the fluid). The liquid flow in the pipe can be equal to the cross-sectional area within a meter & the velocity of the liquid flow (Q = A * v). This meter calculates either mass or volume. They offer repeatable & accurate flow measurements for different applications like semiconductor processing, process control, etc. These devices work with the same end goal but in different ways. The working principle of flow meter is to measure the amount of gas, liquid otherwise streams around the device. The main benefits of these meters are improving the accuracy, resolution, and precision of the liquid. Some types of meters mainly focus on liquids and gases in a pipe. These meters are used to measure open channels such as streams or rivers. Alternate names of this device are flow rate sensor, liquid meter, flow gauge, indicator based on the industry but the working principle is the same. Definition: A device that is used to gauge the mass of liquid or gas or volume is known as a flow meter. ![]()
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