Businesses that operate in a variety of industries, used in the manufacture instruments called flow.They are capable of using ultrasound to take into account the amount of water consumed, or other liquids.
Need flowmeter
This device is needed in order to easily measure the amount of sacrificial material over a certain period of time.Most often, those who use pipes, keep records of the quantity of fuel, liquid and gas.It is interesting to note that such devices are used not only in industry and in the home, for example, can be found in the home water consumption.
How to choose the right tool?
order to find the right flowmeter liquid, you must clearly understand the basic requirements, which will be presented to him.It is therefore important to know the process parameters and the process of installation.
Here is a list of key issues that need to understand before you buy such a device:
1. What is the environment (water, air, gases, etc.)?
2. What is needed to measure (total and / or instantaneous flow rate, speed)?
3. In that case, if the liquid is not water, what it has a viscosity?
4. Is there a requirement for the presence of the local / local display, or you will need an electronic liquid flow meter that automatically outputs the signal to the screen?
5. What is the maximum and minimum flow rate of the source?
6. Is the fluid that is inside, is chemically compatible with the internal surfaces, namely contacting parts?
7. The size of the installed tube?
8. The maximum and minimum pressure and temperature of the press?
9. Is the liquid that is measured net?
Ultrasonic flowmeters
liquid ultrasonic flowmeter uses for their work waves that while taking into account the propagation velocity of change in the mobile environment.If you install the source and receiver of ultrasound with a shift of the flow rate can be judged as the change of the sound wave along the entire length.
To measure the rate of a local, you can use the Doppler effect, it needs to be positioned parallel to the source and the receiver, in this case, the signals are passed to the mixer.
ultrasonic flowmeter detects a liquid in frequency at the receiver and modifies it according to the total flow rate and the initial rate, however, remains unchanged.The multiplicity of the signal from the mixer output is the difference between the received frequency and the original motion.From this value, so it is possible to judge the local velocity in the substance.
Portable flowmeter
There is also a portable flowmeter and liquid, which is an ultrasound.This unit is fully equipped with additional accessories and accessories that allow you to solve many problems of measuring the amount of fluid in virtually any environment.It helps to consider the substance with a viscosity of up to 300 cSt in almost completely filled pipes with diameters ranging from 1.2 to 5 cm. The original kit may include:
- single-channel electronic calculator;
- overhead and stationary transducers of many different types and systems for their installation;
- Facilities for measuring the thermal energy flow and resistance thermometers;
- ultrasonic sensors to calculate the pipe wall thickness;
- thermal printer with its member accessories;
- software for the IBM PC, which is fully compatible with the computer;
- power supply and all the accessories that go into it.
Electromagnetic Flowmeter
electromagnetic flowmeter is designed to measure liquid substances that conduct electricity.It consists of a measuring tube having rigid channel section and made of a dielectric material.On the outer surface the magnetic circuit, which looks like two inductors.Also mounted four electrodes - two vertical and two horizontal plane relative to the measuring tube itself.Vertical electrodes necessary for accounting of electric conductivity in the pipe.A sensor that calculates the magnetic field within the bore of the pipe, mounted on its surface.It is located in a steel housing, which is attached to the rack electronics.It displays all the wires and then they unsolder the PCB.External connection moves to the terminals, which are located on this case.On securing the coil and electrodes of metal screens which are not responsive to the magnet, they are then necessarily grounded.Allen sealing is performed by a rubber ring.This allows you to achieve the technical result, which gets underway at the high precision and stability, as well as reliable operation in a wide range of pressures and temperatures.
Doppler flowmeters
This flow meter is designed to measure liquid medium that contains a sound reflectors, namely gas bubbles or suspended solids.These devices are available in three different types.Family gauges include both non-invasive devices and input probes for applications that are used for pipes with good enough by passing ultrasound.
standard features of these devices are:
- designs that have clips;
- programmable interface;
- 8-digit LCD counter;
- power supply with adjustable characteristics;
- body with a good defense;
- pipe sizes can range from 0.25 inches to 6 mm;
- optional dual outputs;
- pulse repetition frequency and relay output.
Mechanical counter
mechanical liquid flow meter is a device in which there are no electronic components.They can be measured by the flow rate, for example, speed mechanical turbine when immersed in its environment.Very often, these devices are used in the kilns, diesel generators, burners and boilers.
Mechanical counter - a flow meter for viscous fluid, so it is used to account for refined petroleum products.All machines are perfect for measuring the fuel that moves by gravity.Standard device in your kit is a mechanical roller counter, and can be equipped with an LCD display or a pulse output.Himself meter and all places of its compounds are sealed in order to avoid the original nakrutok readings that are so fond of the inhabitants of our country.
Heat flow
heat flow meter fluid in his work has a rather simple idea: if locally measure the properties of matter in the stream, for example, it will be the temperature, and begin to record all changes to a specific spot on the footprint, you can fix the average travel speed of anysubstance.If the medium is stationary, then the temperature starts to rise only by conduction, and this process is faster, as located closer to the heating element.In such an analysis of data collected from all sensors can determine the velocity of the material in any stream.
Vortex flowmeters
fluid flow meter of this type has in its structure the main element of which is a spherical or disc-shaped target set bungee, one part of which are fixed.Gas or liquid flow leads to the fact that the target is displaced, which causes displacement of the cable, and strain gauges, which are attached thereon recorded the degree and type of deformation.Data are obtained, allows to judge the speed of movement in the material, as well as its direction.
The main advantages of these sensors is the ability to carry out all measurements in a number of ways in which the work and used the meter.Counter fluid to provide such a multi-tasking, a symmetric target for all necessary directions.
Coriolis flowmeters
Most often, these flowmeters consist of a tube, to which a vibration exposure from an external oscillator.If it is empty, rocking can lead to a synchronous acceleration of its sections.If the tube moves the liquid it will also affect Coriolis force, which is directed to different sides of the output and input, this will lead to a shift of wobble periods.The phase error depends primarily on the weight of the measured fluid that flows per unit time.
The main advantage of this type of devices is their versatility - they can be used to measure the flow rate rather large range of materials.But there is a drawback - it is their high cost, which can afford to mostly large enterprises.
flowmeters company Micronics
Reducing the amount of liquid is an important factor, which characterizes the energy efficiency of buildings and facilities.This famous brand widely available portable liquid flowmeters, which do not need to cut into the pipeline.Portaflow 330 Series provides accurate and rapid measurement of the amount of consumption of raw materials, and it is distinguished by its ease of operation, thanks to the intuitive menus and settings during operation.The procedure itself on the measurement takes just a few minutes.The devices are small enough and reliable, and also differ in their stable performance for sufficiently long-term use in the workplace.
In Micronics flow meters based on the so-called method of "time-of-flight", with which you can measure the frequency of two-dimensional ultrasound propagation, which publishes special sensors attached to the pipe.The speed of the signal passing through the liquid in the tube is greater in the case of a signal along the direction of flow and in the opposite direction indicators are not identical and the speed of the ultrasonic signal decreases.
flowmeters Siemens
This brand is both installed and overhead liquid flow.On today considered the leading sensor MAG 5100w.It is a compact device with very precise characteristics.It is used for instant measurement of clean and waste water.For his work will be required to supply 220 or 24, and the pipe is full.If it is empty, it will show the device with the help of the relay.The converter is most often installed on top of the sensor, but you can also use the optional mounting kit, which contains a cable to the machine can be controlled remotely.Significantly, it is possible to seal the device, thereby increasing its protection class to IP68.Because of this it can be used for a sufficiently prolonged immersion or flooding.
main advantages flowmeters Siemens
- High repeatability and accuracy gives full confidence in the accounting of all flows.
- The devices have a high quality and robust construction, without the details that move.This means that wear occurs very slowly, therefore, no need for maintenance for a long time.
- has control of the filling of the pipeline, which will warn about using your device in the unfilled tube, thereby reducing the likelihood of erroneous measurements.
- Backlit keypad and display helps the user to easily control all the settings and measurements.
- Bi-directional flow provides the user account with all the information about the movement in the pipeline.
- SENSORPROM ™ technology guarantees automatic downloads of metrological parameters of the instrument.
- convector flow compact or remotely mounted using brackets which are fixed to the sensor.
most frequently used to measure wastewater or drinking water, as well as to account for the liquid chillers and test stands.
Consider two firms producing sensors, it can be concluded that each of them deserves to exist on the market, as engaged Micronics and Siemens counters for different purposes.Both brands are responsible for their high quality and long service life due to the fact that more than a year engaged in the development and introduction of new technologies in the industry.
