Archive for September 2014

Dangers of Digital Utility Meters

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Different Types of Flow Meters

The advancement of science and technology has made our life easier. Now, most measurements can be done in just a few minutes. These new technologies to measure different types of liquids and gas were first accepted by the industries and then by other people.


There are different types of flow meters like electromagnetic flow meter, Mag Flow Meter, vortex flow meter, ultrasonic flow meter and many others. Before you purchase a flow meter, you need to consider the operating principle of each flow meter and then decide which flow meter is fulfilling your requirements. In order to make the correct choice, know all about the flow meter that you are planning to purchase.

Magnetic Flow Meter

Magnetic flow meter is basically used for water applications. It offers reliable and accurate measurement. It can efficiently and reliably detect an empty pipe. Also, it has a low maintenance cost for calibration. A Mag flow meter has two coils, one is placed at the top and the other is placed at the bottom of the flow tube which is compelled by the transmitter for the generation of pulsed magnetic field to coherent strength.

Mag meter follows the principle of Faraday’s Law. The law states that when a conductor is passing through a magnetic field it makes a voltage which is directly proportional to the conductor’s velocity.

Ultrasonic Flow Meter

An ultrasonic flow meter is used for waste water applications and also for other dirty

liquids. It does not work with gas or gaseous substance. It is basically a volumetric flow meter and is beneficial for low pressure drops. It involves low maintenance cost.

Ultrasonic Flow Meter works on the frequency of the ultrasonic signals which are reflected by fluid in motion. The basic phenomenon of this flow meter is the sound waves that change frequency due to the reflection of moving discontinuities in liquids. Ultrasonic sound is also transmitted into a pipe. This discontinuity in liquid reflects the ultrasonic waves with different frequency which is directly proportional to liquid flowing rate.

There are three types of ultrasonic flow meters – Transmission flow meter, Open-channel flow meter and Reflection or Doppler flow meter.

Turbine Flow Meter

Turbine Flow Meter is used for measuring natural gas and liquid flow. It translates the mechanical action of the turbine rotating in the liquid flow around an axis into a readable rate of flow. The turbine wheel is placed in the path of a fluid stream. The flowing liquid gets in contact with the turbine blades, thus, imparting a force to the blade surface and setting the rotor in motion

Turbine meters are made of cast iron, bronze or ductile iron. Fire meters are used for high flow rates required in fire protection.

This article talks about different types of flow meters invented in order to measure liquid, gas and gaseous substances. It talks in details about Turbine Flow Meter, Ultrasonic Flow Meter and mag flow meter.

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