Flow Meter

A flow meter is a device used to measure the instant flow rate or quantity of a gas or liquid passing through a pipeline. Flow meters are also known to by other names, such as flow gauge, flow indicator, liquid meter, etc. Depending on the particular industry. yet the function to measure flow remains the same in all the meters. Benefits of using digital flow meters are you can log data, transmit to your flow controller, PLC or SCADA system. Also, you can control the ongoing flow rate in the pipes. By using the batcher feature it is easy to have set amount of quantity in your process.

Why do I need a precision flowmeter?

The total amount of fluid passing through custody transfer process is in large quantity. especially with the current prices of oil and gas, expensive chemicals, pharma ingredients and industrial fuel. A small amount of measuring error may cause a large economic effect. Therefore it is the more important factor to choose an accurate and reliable flowmeter.

Below are some flow meters we manufacture at Process Control Devices

Contact Flow Experts

What are the various types of flow meters technologies?

The accurate measure of flow is critical in any industrial process. It is being used in various application in industry and can measure flow rate depends upon flow technology used. Each flow measuring technology has some limitation, as no flow meter is universal suitable for every application.

There are five different types of flow measuring technologies:-

Differential Pressure Flow Meters

Differential pressure flow meters, also known as DP flow meters, they rely on Bernoulli’s equation to measure the flow of fluid through pipe. Constriction in the flow tube causes the velocity of the flowing fluid to change. Pressure drop increases as the flow increases.

When fluid flows due to obstruction in flow path it creates a difference in upstream and downstream pressure. Difference in inlet and outlet pressure is sense by differential pressure transmitter. Differential pressure flow meters used to measure the flow of liquid, gas and steam. Due to engineering restriction a single flow meter meant to configure to measure both liquid and gas phases. They are being used in industries such as Oil and gas, power, chemical, pharmaceutical, waste water, mining, metals, paper and pulp, HVAC, and food industries.

Types of Differential Pressure Flow meters

  • Orifice Flow meter
  • Venturi Flow meter
  • Nozzle Flow meter
  • Pitot-static tube Flow meter
  • Elbow Flow meter
  • Wedge Flow meter
  • V-Cone Flow meter
  • Spring-Loaded Variable Aperture Flow meter
  • Laminar Flow meter

Positive Displacement Flow Meters

Positive Displacement Flow meters, also known as PD flow meters.  They are best suitable for liquid flow measurement and can obtains high accurate metering over long course of operation. It is often used for viscous liquid flow measurements and for custody transfer. They are also termed as mechanical flow meters. PD flow meter consists of a chamber which restricts the flow. A rotating or reciprocating mechanical device measure the fluid volume, deliver it fast and refill it again. They have the ability to handle a wide range of fluid viscosity with good levels of durability and repeat ability. They does not required any flow conditioning . They appropriate for flow measurement of diesel, petrol, edible oil, de-ionized water, DM water. This measuring technology is available in a wide variety of configurations and options including digital displays, mechanical counters, and battery powered models.


Types of Positive Displacement Flow Meters

  • Oval Gear Flow Meter
  • Nutating Disc Flow Meter
  • Roots Flow Meter
  • Multi-Piston Flow Meter
  • Bi-Rotor Flow Meter

Velocity Flow Meters

The flow rate is proportional to the velocity of the fluid in velocity flow meter. These types of flow meters seek a linear relationship to linear flow rates. No square-root relationship exists in velocity flow instruments. This flow measurement technology has a better range compared to other flow technologies. Linear relationship between velocity and flow rate allow them to measure flow over a wide range.


Types of Velocity Flow Meters

Mass Flow Meters

They are also referring as an inertial flow meter. This flow measuring device measures mass flow rate of a fluid flowing through a pipe or tube. It measures the flow rate of fluid according to mass per unit time. Mass flow rate is dependent on the fluid density. It is easy to calculate the mass flow rate of fluid if the density is constant. If the density fluid varies, then the relationship is not simple. The density of the fluid may change on temperature, pressure, or composition.

Types of Mass Flow Meters

Open Channel Flow Meters

Open channel flow meter measures the flow of liquids that are open to atmosphere at flow measurement path. Rivers, canals, streams and irrigation ditches are few example of open channel flow. To achieve accurate flow measurement both Level measurement and velocity measurement are must. Open channels are natural or man-made structures through which liquid flows with a free surface. Flumes, weirs and v-notches are being used to measure the flow liquids. These are dam like arrangements which enable a limited or free-flow of fluids, based on the size and shape of the structure.


Some of the more common methods currently in use to measure open channel flows are:

  • Timed Gravimetric
  • Tracer-Dilution
  • Area-Velocity
  • Manning’s Equation / (Gauckler-Manning-Strickler Formula)
  • Hydraulic Structures

Different Types of Flowmeter video tutorial

Features of FlowMeter

► 12 X 2 LCD display
► Microcontroller based design
► Relay Output to drive Contactor / Actuator
► 4-20mA Flow rate/Batcher Output
► Accuracy +/-1%
► Instant flow rate Indicator
► Totalizer zero reset with password protection
► RS 485 Communication Protocol optional
► Offline Data Printing optional

Are you Looking for flow meters manufacturer in India?

contact us today to get the best techno commercial quotation for all types of digital flow meters.
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