#waterflowmeter

Flow Meter Verification Singapore Certified Compliance and Calibration

For any flow meter, uninterrupted operation is important. If there is no obstruction in the flow path within the meter, the meter can live longer. Mechanical flow meters, by their design, work with a flow element that is supposed to obstruct the flow.

Mechanical flow meter sensors can get damaged, choked, or deformed. This causes errors and reduces the life and reliability of these meters.

It is wiser to switch over to Electromagnetic flow meters in such cases, as these flow meters do not obstruct the flow and hence can give long life and reliable results over a long period.

Manas offers Economical Electromagnetic flow meters that are just the perfect choice!

https://manasmicro.com/elect.../economical-flow-meter-smart/

With several kinds of flow switches on the market, it can be difficult to choose the perfect product for your specific purposes. Here are some important things to know before choosing a flow device from a premier manufacturer of flow switches.

What is a Flow Switch?

A flow switch is a mechanical device used to control the flow of liquid, steam, or air. Flow switches do this by sending trip indications to other devices within the framework (such as a pump), signaling it to shut off or turn on and safeguarding it from getting damaged.

This device keeps track of a set point and determines whether the flow is below or above this specific rate. This set point may be fixed or adjustable, depending on the specifications of the product. When this set point is reached, sometimes the response is an electric circuit’s actuation. Once it is tripped, the flow switch remains in its new condition until the flow falls under the set point.

What are the major benefits of Flow Switches?

Flow switches are one of the most trustworthy instrumentations for deciding flow rates. They’re utilized in several industries, such as biomedical and semiconductor manufacturing industries to name just a few. Flow switches are versatile, economically viable instruments providing incredible precision. Some switches can be utilized for actuating visual or audible alarms, as well as other controls and relays.

How are Flow Switches different from Flow Meters?

The main distinction between a flowmeter and a flow switch is the way they perform. Flowmeters simply monitor the flow rates, requiring manual inspection from the operator to determine whether there is any problem. Flow switches, on the other hand, detect the flow and perform a determined action if it reaches the set point, maintaining desired function.

Innovative Products from Proteus Industries

Proteus Industries offers a wide range of flowmeters, flow switches, and other calibration devices used worldwide. Our products are rugged and sensitive, available in several different types of materials, and are suitable for nearly every measuring and monitoring application.

Ultrasonic flow measurement is based on the principle of transmission and receipt of sound waves, which have a unique quality of bouncing off most objects - solid, liquid or gaseous. This technology is vastly different from traditional flow measurement technologies that use turbines or thermal sensors to measure the flow rate of fluids.

Demand from industry for higher accuracy and lower costs have led to development of ultrasonic flow measurement technologies that fulfill meet the requirements of wide range of applications and processes. While there are number of different technologies in ultrasonic measurement currently available in the market, these can broadly be categorized into four types. This categorization is based on the principle on which these technologies are based.

Transit-time Technology

This the original ultrasonic technology developed for measurement of flow rate of fluids. The technology uses the transit time of sound waves to measure velocity. An ultrasonic flow meter based on this technology has two ultrasonic transducers. These transducers act as both transmitters and receivers of ultrasonic sound waves. To measure the flow rate or velocity of fluid - either gas or liquid through the pipe, the flow meter alternates between sending and receiving bursts of ultrasonic sound waves through the transducers. The time taken by the sound waves to travel from the transmitting transducer to the receiving one gives an exact reading of the velocity of liquid in the pipe.

Ultrasonic Doppler Technology

This technology also works by using two ultrasonic sound transducers. However, unlike the transit-time technology, Doppler utilizes one transducer as a continuous transmitter of ultrasonic sound waves. The other transducer acts as a continuous receiver. Sound waves introduced into the flow are reflected or scattered back off suspended particles or bubbles in the fluid and captured by the receiving transducer.

The reflection causes a frequency shift in the sound waves, which is known as the Doppler Effect. By measuring this frequency shift it is possible to determine the flow velocity of the fluid in the pipe. This velocity, when computed with the cross-section area of the pipe gives the flow rate of pipe flow.

Cross-correlation Measurement Technology

Cross-correlation measurement technology works on the principle that turbulent flow of a fluid is formed of eddies that have nearly consistent characteristics across a small cross-section of flow. This is known as the correlation length. A flow meter based on cross-correlation measurement technology has two ultrasonic sensors placed along the direction of flow of fluid.

The first or upstream sensor picks up the signature of turbulence L/V seconds before the second or downstream sensor, where L is the distance between the two sensors and V is the velocity of flow of fluid. The velocity thus turns out to be L/T, where T is the time delay in detection between the two sensors.

Acoustic Doppler Velocity Profiling Technology

The acoustic Doppler Velocity Profiling technology works on the same principle as the Doppler technology, with the difference that it uses three transducers instead of two. One of the transducers is a narrow-beam transducer while the other two are large angle ones. The three transducers are arranged in a straight line with the narrow angle one positioned directly above the flow while the other two ones are placed on either side of it.

The middle transducer emits ultrasonic sound waves at a fixed Pulse Repetition Frequency (PRF), which get scattered from particles within the fluid. The other two transducers receive these reflected waves and provide a "pulse-to-pulse" algorithm. This in turn allows the measurement of the Doppler shift in two different directions, which can be used to create a 2D velocity profile.

The function of a control valve is to regulate the liquids’ flow rate through pipelines in a system. And this achieved by putting a valve in the liquid flow’s path. It typically provides resistance to the liquid flow, where process control restrains the flow and resistance by a signal. This signal is actually borrowed from the sensors in a plant. We must note here that when a manufacturer supplies a control valve, he attaches it to an actuator which utilizes this control signal for activating the ultimate control component.

 The various kinds of valves are classified by a connection between the flow rate through a valve and the position of a valve stem. 3 prime kinds of valves depending on the connection between the flow rate and stem position are Equal Percentage, Linear, and Quick Opening. The connection between the stem position at a stable pressure drop and the flow rate through a valve is known as the Inherent Valve features. The connection between the stem position for a valve and the flow through a valve installed in the procedure order at changing pressure drop is termed as Effective Valve features.

 In order to restrain the liquid flow, a quality liquid flow control valve is the best option to opt for. This is the best system which makes sure that the flow should be regulated according to the criteria. The pre-set indications in the valves ensure that the guidelines for the user are readable. Depending on these guidelines, the functions in the process controlling take place. In many cases, it is recommended to choose particularized limits, something which is not harmful; with this, the controlling procedure will seamlessly run. If the particularized limit is set at a high rate or changed anyhow, then it might cause an alarming condition for which the user requires taking important and fast action. For being certain that the liquid level doesn’t cross the particularized limit, the valve is opened which will simply drain out the extra water. Instead of wasting on the liquid by setting its flow high, it’s greater to set its limit at a moderate level.