What is transit time ultrasonic flow meter?
Transit time ultrasonic flow meters measure the difference in time from when an ultrasonic signal is transmitted from the first transducer until it crosses the pipe and is received by the second transducer. A comparison is made of upstream and downstream measurements.
How accurate are ultrasonic flow meters?
Magmeters are highly accurate, with inaccuracies of ±0.5 percent of rate or less. In comparison, transit-time ultrasonic meters have inaccuracies of ±1 to 2 percent of rate. Cost comparisons depend greatly on the specific project rather than meter cost. Both meters can provide cost-effective flow measurement.
How long does a flow meter last?
What is the expected life of your flow meter? In some applications such as subsea oil/gas production, your flow meter must have a life expectancy of 25 years or more with no possibility for maintenance. In other applications, a simple disposable device with a one to two year lifespan is perfectly acceptable.
Do you agree that ultrasonic flow meter is the best?
Flow control purposes such as CMP and other high precision pump system applications also will use ultrasonic flow meters. Ultrasonic flow meters are often preferred over other flow measurement methods because of their high accuracy and repeatability measurement capabilities.
What is the principle of ultrasonic flow meter?
The working principle of ultrasonic flow meter is, it uses sound waves to resolve the velocity of a liquid within a pipe. There are two conditions in the pipe like no flow and flowing. In the first condition, the frequencies of ultrasonic waves are transmitted into a pipe & its indications from the fluid are similar.
Why we use ultrasonic flow meter?
Ultrasonic flow meters use sound waves at a frequency beyond the range of hearing (typically 0.5, 1, or 4 MHz). Clamp-on ultrasonic flow meters allow users to measure the volumetric flow rate of a fluid in a pipe without having to penetrate the pipe which decreases installation and maintenance costs.
What is ultrasonic principle?
Ultrasonic sensors emit short, high-frequency sound pulses at regular intervals. If they strike an object, then they are reflected back as echo signals to the sensor, which itself computes the distance to the target based on the time-span between emitting the signal and receiving the echo. …
How do I choose a water flow meter?
When selecting a flow meter consideration must be given to:
- Flow measurement type – momentum (velocity), volumetric or mass flow measurement.
- Media – type of media (liquid, gas or slurry) and any special condition such as particulates in the media and viscosity of the media.
Can an ultrasonic flowmeter be used to measure the flow rate of air in a pipe?
Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe.
What is the working principle of flow meter?
Magnetic flow meters measure the speed of a fluid passing through a pipe using a magnetic field to measure the volumetric flow. They are based on the principle of Faraday’s Law of Electromagnetic Induction, according to which liquid generates voltage when it flows through a magnetic field.
Which is global water ultrasonic flow meter do you use?
The Global Water FM500 ultrasonic flow meters provide accurate and trouble free flow metering for a wide range full pipe applications including: potable water, raw wastewater, effluent, well water, slurries, or virtually any sound conducting liquid.
How does the global water fm500 flow meter work?
Ultrasonic clamp-on flow meters that use transit time and Doppler methods to measure flow. The Global Water FM500 ultrasonic flow meters provide accurate and trouble free flow metering for a wide range full pipe applications including: potable water, raw wastewater, effluent, well water, slurries, or virtually any sound conducting liquid.
How does a transit time ultrasonic flow meter work?
Transit time ultrasonic flow meters use two transducers, which mount to the outside of the pipe and function as both ultrasonic transmitters and receivers. The flow meters operate by alternately transmitting and receiving a frequency-modulated burst of sound energy between the two transducers.
What kind of clamp is used on ultrasonic flow meter?
The DMDFP portable clamp on Doppler ultrasonic flow meter can be used with most solid-bearing and aerated liquids, and can be configured for use with pipe sizes ranging from 15 mm to 4000 mm. It offers a wide range of flow measurement, and its compact design makes it easy to use.