Archive for May 2013

How Wireless Telemetry System Helpful in Irrigation System?

Posted on Thursday, 23 May 2013 by

Telemetry is the system of wirelessly accessing remote data that is used for measurement. Most commonly data is collected using radio, hypersonic and infrared systems. Wireless telemetry systems can be used in various fields and an example of very popular and low-cost telemetry service is SMS where data is transmitted via GSM networks. Wireless telemetry systems are also useful in several other fields such as agriculture. It has pioneered the irrigation system in several countries and if used rightly it can increase yield immensely. Wireless telemetry system is helpful in gathering real-time crop data and tools. This real-time information is immensely helpful in innovating irrigation systems.

The wireless monitoring systems can be used 24X7. They have automatic setting that helps cut down on manual data collection of agricultural practices with special emphasis on irrigation. Commonly, it is found that the intuitive web-based interfaces work automatically sending notifications to farmers and irrigators as and when required about any change observed in the irrigation process. Once the data has been recorded, the same can be transmitted in real time via emails and mobile phones.

Some of the features that are found in the wireless telemetry systems include monitor that record water-use quotas and alarms that rings when the water usage is more or less. The devices are also used to track crop data. In most cases, they are one-in-all device that automatically measures water flow, has installed and required hardware and software.

Advantages of Wireless Telemetry System Used in Irrigation System

Use of Advanced Technology: The most endearing feature of the wireless telemetry systems used in irrigation is that they use advanced technology. In this case the advanced technology means more systems, better sensors and more solutions. Their advanced sensors are built in such a way that they are used not only by farmers but also by crop consultants, distributors and dealers. The wireless telemetry are remotely connected through satellites, radio UFH or spread spectrum which ensures that the data collected are error-free.

Assured Performance: Wireless telemetry system have been in the market for quite some time and have proven that they are of highest quality. They have been giving assured performance that has improved agricultural yield. Moreover, most of the companies supplying wireless telemetry systems also offer after sales, installation and expansion support.

Simple: Most of the wireless telemetry systems available in the market and which are used for irrigation is simple to use. Farmers, irrigators, growers and agri-businessmen can easily reap in the advantages after using these simple devices.

Reduced Labour Input – With the help of this system agricultural businesses can eliminate layers of labor costs in operations. This system allows them to monitor machines from a distance and alerted when there are problems detected.

Affordable: While wireless telemetry systems are handy and simple to use giving great results, these are very affordable too. Most of the leading telemetry systems available in the market are priced such that middle-class farmers can also use them without worrying about their investments and expenditure.

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This post is shared by spiremt.com, which is a leading supplier of digital flow meters, and water meters. Here you may get wireless telemetry systems at very affordable price.

Types of Water Flow Meter and it's Benefits

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Water flow meters are used to measure the flow of water and are most essentially used to estimate the use of water for domestic and industrial purposes. These devices have become increasingly popular as they help to get the accurate measurement of the amount of water that is used by households or industries. Water flow meters are also used to check on water leaks and thus prevent wastage of water. There are different types of water flow meter and each of them is used for different purposes. In this article we will see some of the water flow meters.

Positive Displacement Meter

The positive displacement meter is the most commonly found water flow meter. It is most commonly found in households where it is used to measure the flow of water, especially the low flow of water. The positive displacement meter works by measuring the flow of water that is compared to the previous volume of water that was stored in a chamber (where the flow meter is also placed). To calculate the flow of water, the number of times the chamber is emptied and filled is counted.

Velocity Water Flow Meter

As the same suggests, the velocity water flow meter works on the phenomenon of velocity. There are various mechanisms used to calculate the volume of water. The velocity water flow meter is especially helpful to measure large volumes of water. Thus it is seen that this kind of flow meter is more often used in huge industries where large amounts of water is used every day. Among the different kinds of velocity water flow meter available in the market, some of the common ones include turbine meters, multi-jet meters, magnetic meters, ultrasonic meters, venture meters and orifice meters.

Hot Water Flow Meter

Hot water flow meter comes in two forms – turbine hot water and multi-jet water meter. The multi-jet hot water flow meter gives precise measurements and is most commonly used where the water flow is less. On the other hand the turbine hot water flow meter is used for commercial purposes as it can measure large volumes of water.

Compound meters and electromagnetic meters are other types of water flow meters found in the market.

Benefits of Water Flow Meters

To reduce wastage of water, flow meters are extremely helpful. However, there are several other benefits of using the different kinds of flow meters, some of which are mentioned below-

Water flow meters help to increase the water supply as power is increased. But while the water power is increased, the power consumption isn’t affected.

Most of the water flow meters are built in such a way that they can withstand harsh conditions such as bad weather, scratch and rust.

Water can be measured and distributed, which is one of the biggest advantages of water flow meters. This helps in reducing wastage of water.

Water flow meters are also used in agriculture where the exact amount of water is measured and then discharged into the fields.

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This post is contributed by SpireMT, a leading supplier of portable ultrasonic flow meter, digital flow meters, electrical energy meters, water flow meter and many more. For more information visit at www.spiremt.com

Working Principles of Magnetic Flow Meter

Posted on Wednesday, 22 May 2013 by

Magnetic flow meter, simply known as mag flow meter is a volumetric flow meter which is ideally used for wastewater applications and other applications that experience low pressure drop. The device doesn’t have any moving parts and cannot work with hydrocarbons and distilled water. Mag flow meters are also easy to maintain.

Working Principle of Magnetic Flow Meter Based on Faraday’s Law

The magnetic flow meter works on Faraday’s Law and can be simply understood by most. The Faraday’s Law states that the voltage induced across any conductor (that moves at a right angle through the magnetic field) is proportional to the velocity of the conductor. Thus-

E is proportional to V x B x D.

[E is the voltage generated in a conductor, V is the velocity of the conductor, B is the magnetic field strength and D is the length of the conductor].

It is very important that the wastewater that is to be measured using the magnetic flow meter must be electrically conductive. The Faraday’s Law indicates that the signal voltage (E) is dependent on the average liquid velocity (V), the length of the conductor (D) and the magnetic field strength (B). The magnetic field will thus be established in the cross-section of the tube, in the case of a wafer-style flow meter.  

Basically when the conductive liquid flows through the magnetic field, voltage is induced. To measure this generated voltage (which is proportional to the velocity of the flowing liquid), two stainless steel electrodes are used which are mounted opposite each other. The two electrodes which are placed inside the metering pipe are then connected to an advanced electronic input that has the ability to process the signal. The processed signal is fed into the microprocessor that calculates the volumetric flow of the waste water. The processed signal also controls the various outputs on the terminal board.

Important Points to Note

The magnetic flow meter works on a principle that is complex when not understood and easy when rightly used. The results will come out well only when everything within the magnetic flow meter is placed properly. For doing this it is important that everything is done scientifically and correctly. If the device is not rightly placed the results will be largely affected. Thus to first set up the device expert help should be taken. Remember that if the installation is wrong, its long-term effect will be harmful as the results will be flawed. It is always best to hire experienced experts who have installed many magnetic flow meters.

It is true that the flow meter can be self-installed after taking online lessons or reading up a few books that explain the Faraday’s principle in details. In the online space, there are several self-help and tutor-based lessons that give detailed explanation on how a magnetic flow meter works. If you want to learn the usage of the device yourself, these online tutorials are of great help.

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This post is shared by spiremt.com, which is a leading supplier of magnetic flow meter, water flow meter, ultrasonic heat meters, digital flow meters and more. For more information visit at www.spiremt.com

How Ultrasonic Flow Meters Measure The Flow Of Water?

Posted on Monday, 20 May 2013 by

Ultrasonic flow meters are devices that help calculate the flow of water by measuring the velocity of the liquid by using ultrasound. Ultrasonic flow meters are extremely useful as they particularly help in measuring the flow of waste water. They are ideal for measuring waste water flow as when distilled water is used on this kind of device, aerations have to be added. These flow meters work because of the acoustic properties found in the water and things like temperature, density viscosity and suspended particulates impact the result.

Different Ultrasonic Flow Meters

There are three kinds of ultrasonic flow meters that can be used to measure the flow of water. The first kind is known as transmission flow meter, which is also known as contrapropagating transit-time. The transmission flow meters are again of two types- in-line also known as intrusive or wetted meters and clamp-on (non-intrusive) meters. The second type of meter is known as the reflection or Doppler flow meter as it uses Doppler Effect to measure the flow of water. The third kind is called the open-channel flow meter.

How Flow of Water is Measured Using Ultrasonic Flow Meters

To measure the flow of waste water using ultrasonic flow meters the basic principle of the Doppler Effect has to be understood. The Doppler Effect comes into play when the metering technique measures the changing frequencies of water flow that occurs due to discontinuities in the water. It uses a technique which is similar to measuring sound waves. The operation thus uses the frequency shift that reflects the suspended gas bubbles or particles that interrupts the motion of water.

To measure the flow of water, ultrasonic sound is transmitted into a pipe. When the ultrasonic sound passes through the discontinuities in the water, a difference in frequency is observed which is measured. This different frequency is directly proportional to the rate of flow of liquid. However, to ensure that the ultrasonic flow meter works effectively, the liquid should contain at least 100 parts per million (PPM) of 100 micron. This essentially means that the large suspended particles or bubbles should be found in water that is to be measured.

Points to Remember before Choosing an Ultrasonic Flow Meter

Since ultrasonic flow meters come in various forms and thus it is very important that a few things are remembered before choosing a flow meter.

  • The liquid that is to be measured should have 100 ppm of 100 microns?

  • A handheld monitor is necessary for repeatedly measuring the output. A continuous process monitor can also be used.

  • Know the minimum and maximum flow rate of the pipe.

  • Note the minimum and maximum process temperature and process pressure.

  • The size of the pipe that is being used. It is very important that an appropriate size is used.

  • Decide whether you would be using a digital output or an analog device.

  • Before the ultrasonic flow meter is used to measure it should be noted whether the pipe will always be full or not.

This post is shared by spiremt.com, which is a leading supplier of ultrasonic flow meters, ultrasonic heat meters, digital flow meters, water flow meters and more. For more information visit at www.spiremt.com

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