Flowmeter Types
The purchase of flowmeter types should be based on the working principles and method of measuring flow. The most important types of flowmeters are:

Mass Flowmeter
These flowmeters are used to measure the mass of a fluid (not its volume) and are very useful in applications where changes in density and temperature are important.

Thermal Mass Flowmeter
Thermal mass flowmeters use the temperature difference created by the flow of fluid to measure the mass of the flow.

Coriolis Flowmeter
Measures the exact mass of the fluid using the Coriolis effect.

Volumetric Flowmeter
A volumetric flowmeter measures the volume of fluid flowing in a given time period

Mechanical Flowmeter
In a mechanical flowmeter, moving parts such as an impeller or gear move with the flow of the fluid.

Turbine Flowmeter
Has an impeller or turbine that rotates as the flow passes through it and measures the speed of the flow.

Vortex Flowmeter
The vortex flowmeter determines the flow rate by creating vortices.

Positive Displacement Flowmeter
Passes a certain amount of fluid per cycle and has high accuracy for viscous liquids.

Differential Pressure Flowmeter
The differential pressure flowmeter calculates the flow rate by measuring the pressure difference before and after an obstacle in the fluid path.

Orifice flow meter
The orifice plate flowmeter calculates the flow rate by creating a pressure difference across a perforated plate.

Venturi Flow Meter
A Venturi flow meter uses a tapered tube to reduce pressure and increase velocity to calculate flow rate.

Rotameter
A rotameter or variable area flow meter has a moving float in a transparent tube that moves as the flow rate changes.

Magnetic Flowmeter
A magnetic flow meter uses the magnetic induction property of conductive fluids to measure flow.

Ultrasonic Flowmeter
Ultrasonic flowmeters use ultrasonic waves and changes in the transit time or frequency of reflection to measure fluid flow without direct contact with it.

Doppler Ultrasonic Flow Meter
A Doppler ultrasonic flow meter uses the frequency change of ultrasonic waves reflected from suspended particles or bubbles in the fluid to measure fluid velocity and flow.

Transit-Time Ultrasonic Flow Meter
A transit-time ultrasonic flow meter measures the speed and flow rate with high accuracy by comparing the time it takes for ultrasonic waves to travel in and out of the fluid flow.

Portable Ultrasonic Flow Meter
A portable ultrasonic flow meter is portable and can measure the flow rate without having to come into contact with the fluid.

Rotational Flow Meter
A rotary flow meter has rotating gears to accurately measure the flow rate of liquids.

Flowmeter Buying Guide and Price Check for Types of Flowmeters
When purchasing a flow meter, you should consider the type of fluid, measurement accuracy, environmental conditions, and working pressure. In systems with high pressure and temperature, it is recommended to purchase a Venturi or orifice plate flow meter. If you are looking for high accuracy, Coriolis or ultrasonic flowmeters are good options, but the price of the flowmeter in these models will be higher.

Flowmeters without moving parts, such as magnetic and ultrasonic flowmeters, require less periodic service and are more cost-effective in the long run. In addition, the flowmeter output is also important.