Posts Tagged ‘Flow’

Air Flow Sensor, Etc. About Five Cars With Sensors

Friday, March 17th, 2017

Car Sensor A car computer system input devices, which run the car in various conditions of information, such as speed, temperature of various media, Engine Operating conditions, etc. into the computer lost the telecommunications number to the engine in top working condition. Many vehicle sensors to determine when the sensor malfunction should not only consider the sensor itself, but should consider the failure of the entire circuit. Therefore, to find fault, in addition to check the sensors, we should also check the wiring harness, connectors and sensors and electronic control unit of the circuit between. Now we come to know about the car’s main sensor.

Air Flow Sensor Air flow sensor is inhaled into the air Telecommunications No. sent to the electronic control unit (ECU), as the decision to spray one of the fundamental signal. According to different measuring principle, can be divided into rotary vane air flow sensor (PREVIA Toyota station wagon), Karman vortex air flow sensor Tour (Toyota Lexus LS400 sedan), Hot-wire Air Flow Sensor (Nissan Maxima car

VG30E engines and domestic passenger TJ6481AQ4 Tianjin Sanfeng equipped with the Volvo B230F engine) and the hot-film air flow sensor for the four types. Volume flow rate for the first two types, the latter two for the mass flow type. Currently the main use of hot wire and hot-film air flow sensor air flow sensor two.

Inlet pressure sensor Inlet pressure sensor can detect the engine load conditions within the intake manifold absolute pressure, and converted into electrical signals and sent to the computer with the speed signal, as the decision to the basic fuel injection amount of injector basis. Domestic Audi 100 Car (V6 engine), Santana 2000, Beijing Cherokee (25L engines), Toyota Crown 3.0 car all adopts such a pressure sensor. Is now widely used Semiconductor Pressure-sensitive Resistance Inlet air pressure sensor.

Throttle Position Sensor Throttle position sensor installed in the throttle, the throttle is used to detect the opening. It is through the lever body and throttle linkage, and thus reflect the different engine operating conditions. This sensor can be the engine of the different conditions tested and enter the electronic control unit (ECU), thereby control the amount of different fuel injection. There are three types: contact-type switch Throttle Position Sensor (Santana 2000 and Tianjin trimodal bus), linear variable resistor-type throttle position sensor (Beijing Cherokee), integrated throttle position sensor (Audi 100 V6 engine).

Crankshaft Position Sensor Also known as crank angle sensor, a computer-controlled ignition system, the most important sensors, whose role is to detect the TDC signal, crank angle signal and engine speed signals, and entered into the computer so the computer can press cylinder The ignition sequence of instructions issued by the best ignition timing. Crankshaft position sensor, there are three types: electromagnetic pulse crankshaft position sensor, Crankshaft Position Sensor Hall Effect (Santana 2000 and Beijing Cherokee), the photoelectric effect-type crankshaft position sensor. Crankshaft position sensor is different, its control and the control precision are different. Crankshaft position sensor is usually installed on the crankshaft pulley or sprocket side, some installed in the camshaft front, and some are installed in Distributor (Santana 2000).

Knock Sensor Knock sensor installed in the engine’s cylinder on the situation at any time to monitor the engine knock. Currently used are resonant and non-resonant two categories.

[Key words]: Sensor   Car Comment Large   In   Small

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Keep Hplc Systems Honest With A Digital Liquid Flow Meter

Monday, March 13th, 2017

Digital liquid flow meters help keep pumps honest and contribute to the labs meeting FDA standards for HPLC system IQ, OQ and PQ validation as well as ongoing performance verification.

Unlike using timers while manually collecting HPLC pump effluent for measurement by weight or volume a labor intensive technique that can be subject to operator errors digital liquid flow meters greatly simplify the pump calibration process and increase the accuracy of validation procedures. HPLC Flow meters can weigh only 12 ounces and are capable of measuring pump flow rates ranging from a high of 25 ml/m down to 0.05 ml/min with a flow rate accuracy of 1 percent. Moreover, critical record keeping can be facilitated by automatic data transfer via a RS 232 interface on many units, to a PC or a battery-powered printer such as the easy to use rechargeable thermal mini-printer.

Specification and Use Suggestions:

When chemists select an HPLC flow meter they should be certain that the model is compatible with all HPLC systems they employ. Other features to look for include a traceable calibration certificate, accuracy at low flow rates, and compatibility with all common HPLC solvents.

Flow meters must be correctly mounted and consistently maintained in order to assure accurate readings. Mounting kits that ship with the units allow several options including on walls, free standing and stacking. Instructions should be closely followed. Lab technicians should establish standard operating procedures for checking the cleanliness of flow meters on an ongoing basis to avoid dirty sensing tubes that lead to incorrect readings.

Remember too that while a flow meter usually is shipped with a traceable calibration certificate, annual recalibration is required in conformance with good laboratory practices.

Fast, accurate calibration of flow rates used in HPLC flow systems can be compromised if the flow meter is not maintained. While GLP (good laboratory practices) call for annual flow meter recalibration by the manufacturer, improper use of these precision instruments can soon render them inaccurate.

A serious error is introducing in immediate succession two immiscible liquids into the flow meter. Either allow the first liquid to completely evaporate or introduce a third solvent in which the other two are miscible.

Dirty sensing tubes in HPLC flow meters may cause bubbles to become entrapped. This can create falsely high readings. If bubbles are observed, a quick fix is to turn the unit off, wait approximately 2 seconds to allow it to drain, then switch it on. Contaminated tubes will also result in an Error 4 reading denoting either the flow meter is not draining or the sensing tube is contaminated.

Another good practice is flushing the flow meter with methanol if it is not to be used for a week or more. This prevents algae growth in the tube.

Robert received his Ph.D. in Chemistry in 1986 and he is still a science geek. After graduating he worked as a bench chemist for 12 years. He then combined his passion for science and business and took entrepreneurial management positions at Bel-Art and Smiths Detection. Using the skills he learned at the big companies he co-founded, Tovatech, a laboratory equipment distributor, specializing in HPLC Flowmeter sales.

How Magnetic Flow Meters Work

Friday, June 24th, 2016

A magnetic flow meter is technically referred to as an electromagnetic flow meter. These are the third most common type of flow meters.
The other two meters that are more common than the magnetic type are the positive displacement and differential pressure flow meters.

Commonly, the magnetic meter is known as a mag meter. These types of meters operate according to Faraday’s law of electromagnetic induction. According to Faraday’s law, as the conductor moves through the magnetic field the voltage is induced. The liquid flowing through the magnetic field serves as the conductor.As for the magnetic field that is created through energized coils that are located on the outside of the flow tube. When it comes to the selection of magnetic flow meters, certain considerations are necessary. This entails things such as the mounting type, pipe diameter, end fittings, performance specifications, special features, and output options. Other important considerations are the ability to monitor media temperature and meter liquids with suspended solids.

In general, these types of meters differ in accordance to their mounting type and pipe diameter. The available options for mounting are the non-invasive, insertion type, and in-line. As for the pipe diameter, this refers to the process pipe, which is going to be monitored.An in-line flow meter is directly installed within the process line. Usually, in order for this type of installation to take place it must be installed on a straight pipe. On the other hand, the insertion-type devices do not have to be installed on a straight line of a pipe.

In most cases, the insertion-type devices require a threaded hole within the process pipe. As for the non-invasive electromagnetic flow meters, they do not have a requirement for direct-mounting within the process flow. Additionally, they can be used within the closed piping systems. Types of magnetic flow meter end fittings
* Clamp
* Compression
* Flanged
* Plain End
* Socket Weld
* Union
* Threaded
* Tube End
* Hose Nipple
The external clamp-on flow meters are non-invasive and use compression fittings in order to tighten them over a joint so they do not leak. In most cases, flanges are square or circular and are connected by welding or bolting. As for the plain-end devices, they can be inserted into the end of the connecting pipe.

The interface and electrical output are the two types of options for magnetic flow meters. The available options for electrical output are switch output, frequency, analog voltage and current. The options available for the interface are fieldbus, network, digital, and serial.

In most cases, a National pipe thread (NPT) is used with threaded designs. Generally, hose-nipple fittings or tube-end fittings are used with shorter pieces of pipe that are male threaded. Magnetic flow meters differ in relation to their features. Some of them have the capacity to measure temperature, level, or density and may have features such as visual or audible alarms, in addition to other types of features. Magnetic flow meters are also available for sanitary applications as well.

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Turbine Flow Meter

Friday, June 17th, 2016

Overview of Flow Measurement Flowmeters are devices that measure the amount of liquid, gas or vapor that passes through them. Some flowmeters measure flow as the amount of fluid passing through the flowmeter during a time period (such as 100 liters per minute). Other flowmeters measure the totalized amount of fluid that has passed through the flowmeter (such as 100 liters). Flowmeters consist of a primary device, transducer and transmitter. The transducer senses the fluid that passes through the primary device. The transmitter produces a usable flow signal from the raw transducer signal. These components are often combined, so the actual flowmeter may be one or more physical devices. Flow measurement can be described by Q = A ? v, which means that the volume of fluid passing through a flowmeter is equal to the cross-sectional area of the pipe (A) times the average velocity of the fluid (v); and W = r ? Q, which means that the mass flow of fluid passing through a flowmeter (A) is equal to the fluid density (r) times the volume of the fluid (Q). Volumetric flowmeters directly measure the volume of fluid (Q) passing through the flowmeter.

The only flowmeter technology that measures volume directly is the positive displacement flowmeter. Velocity flowmeters utilize techniques that measure the velocity (v) of the flowing stream to determine the volumetric flow. Examples of flowmeter technologies that measure velocity include magnetic, turbine, ultrasonic, and vortex shedding and fluidic flowmeters. Mass flowmeters utilize techniques that measure the mass flow (W) of the flowing stream. Examples of flowmeter technologies that measure mass flow include Coriolis mass and thermal flowmeters. Inferential flowmeters do not measure volume, velocity or mass, but rather measure flow by inferring its value from other measured parameters. Examples of flowmeter technologies that measure inferentially include differential pressure, target and variable area flowmeters.

Flow computers are often used to compensate flow measurements for actual process conditions, such as pressure, temperature, viscosity, and composition. Additional flowmeter technologies include flowmeters that measure liquid flowing in an open channel, and insertion flowmeters that measure flow at one location in a pipe and use this measurement to infer the flow in the entire pipe. Insertion flow measurement systems often use a flow computer to compensate for hydraulic effects.

Installation Cautions for Flowmeters In liquid service, be sure that the flowmeter is installed such that it remains full of liquid, because gas/vapor in the flowmeter can alter its geometry and adversely affect accuracy. In gas/vapor service, be sure that the flowmeter is installed such that the flowmeter remains full of gas/vapor, because liquid in the flowmeter can alter its geometry and adversely affect accuracy. Disturbances located upstream (and sometimes downstream) of the flowmeter, such as pipe elbows and control valves, can adversely affect measurement accuracy, because the flowmeter may not be able to accurately measure disturbed flow streams. Be sure to locate control valves downstream of the flowmeter so their flow disturbances are not introduced directly into the flowmeter (as they would be if located upstream). Also, be sure to properly design the upstream and downstream piping with sufficient straight run to remove disturbances that can affect measurement accuracy. Be especially careful when flow is two-phase, such as liquid/gas flow and liquid/solid flow, because these flows can adversely affect the accuracy of many flowmeters. Be careful because some flowmeters can become plugged and stop working in liquid/solid flow streams. Application Cautions for Flowmeters Each type of flowmeter has its own specific applications and installation constraints. There is no “one size fits all” flowmeter. The way to select the right flowmeter is to use the application as your guide, not the technology. Many of these technologies will all work well on many applications. If you start with the application, you can select the technology you wish to use based on accuracy, cost, durability and reliability, rather than trying to make the technology you chose fit the application you have.

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Different types of Flow Meters

Monday, April 25th, 2016

A flow meter is definitely an instrument which can be used to measure the flow of fluid.The Fairest anesthesia machine flow meter Are Delivered, Go to Have a Look!. It’s a broad array of industrial makes use of. Along with a number of stream meters have emerged because the industry continues to develop. With a large number of different styles of movement meters, it truly is really required to classify the stream meters, so that men and women will get to know which kind of flow meter to pick in several functions.Several Beauty and Wrong-doings of oxygen flow meter. There’s two methods frequently used in classification, the 1st one particular is usually to classify through the measurement principle in the flow meters, the second a single is as per the structure with the stream meter. Below we’ll mostly talk about your second a single, for it can be more clarity.


Based on the real circulation goods in latest along with the construction principle, the stream meters can be broadly grouped into the subsequent types. Volumetric flow meter Volumetric circulation meter is equal into a regular quantity of container, which keeps measuring the circulation medium. The theory of the volumetric stream meter is simple, and it does very effectively in measuring these fluids with high viscosity and low Reynolds amount. Impeller-type movement meter The impeller is positioned in the measured fluid, and also the impeller will rotate when the fluid flow. The size with the very low is measured through the rotating speed of the impeller. A single case in point of the sort of circulation meter is the turbine circulation meter, the output of it can be electrical pulse signal, and it’s higher accuracy. Differential pressure flow meter This sort of system contains the first product and the second system.


The first product is called stream measurement gadgets, it’s installed in the fluid pipeline, and the pressure distinction will likely be generated, your second device will display it. The 2nd gadget is really a display product, it receives the differential stress sign produced by the very first product, and rework it into your corresponding flow, then show it. This strategy for movement measuring incorporates a prolonged history, could it be much more mature then other styles of movement meters. And this sort of circulation meter can typically be noticed in electricity plant, measuring the stream of steam, feed drinking water and condensation h2o. Variable location circulation meter It is also known as stress decline movement meter. One standard case in point of this kind may be the rotor circulation meter. Momentum flow meter The dimensions with the circulation is measured by measuring the momentum in the fluid. Focus on movement meter and rotating wing plate kind floe meter belong to this sort. Impulse-type circulation meter It truly is usually utilised to evaluate the circulation of granular solids, slurry, abrasive and other liquid and crystalline stream. The measuring array is from a number of kilograms every hour to nearly thousand tons every hour. Electromagnetic circulation meter Accuracy and sensitivity of the measuring outcomes are quite often higher. It can be typically used to evaluate the circulation of h2o, pulp and also of media. However, it cannot be employed to measure these press with minimal conductive, this sort of as gas, steam, and so forth. The cost of electromagnetic movement meter is a little higher, and also the signal is susceptible to external magnetic interference, that is certainly why this sort of circulation meter isn’t so broadly utilised in industrial control apps. Ultrasonic flow meter Ultrasonic stream meter is a non-contact measuring instrument, it can be frequently utilised in the event the circulation is uneasy to access or is hard to observe.


The dimensions in the circulation can also be reflected while in the results of stream speed measuring. Oscillating fluid circulation meter Since it does not have rotating elements as well as the output is digital pulse, this sort of movement meter is extremely promising. Presently, vortex circulation meter is broadly used. Mass movement meter As being the volume of fluid is definitely afflicted by temperature, stress along with parameters, the medium parameters are required when utilizing quantity to show the size of circulation. But in the functions if the medium parameters keep changing, it is quite difficult to fulfill this requirement, subsequently the shown price won’t be appropriate. In this instance, a mass movement meter is required. These ten types of flow meters just isn’t the finish of movement meters. Together with the development of technologies, an increasing number of new kinds of stream meters will emerge to apply in variable occasions.

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Highly Reliable Flow Meter Measures Blended Waste & Natural Gases For Co-Gen Power

Friday, January 22nd, 2016

Highly Reliable Flow Meter Measures Blended Waste & Natural Gases For Co-Gen Power
Designed for demanding environments, the rugged ST98's thermal mass flow sensing element is constructed with two all-welded 316L stainless steel thermowells, protecting two matched platinum precision resistance temperature detectors (RTDs). One RTD …
Read more on International Environmental Technology

Flow meter for waste & natural gases
Designed for demanding environments, the rugged ST98's thermal mass flow sensing element is constructed with two all-welded 316L stainless steel thermowells, protecting two matched platinum precision resistance temperature detectors (RTDs). One RTD …
Read more on PACE Today

Safety-Instrumented Systems: Focus on Measurement Diagnostics
New standards, such as ASME PTC 19.3-2010, significantly improve the reliability of wake-frequency calculations and minimize the risk of thermowell failure due to flow-induced vibration and transient effects. • The measurement is fast enough to detect …
Read more on ChemEngOnline

Nasal Jet-CPAP (variable flow) versus Bubble-CPAP in preterm infants with

Saturday, December 19th, 2015

Nasal Jet-CPAP (variable flow) versus Bubble-CPAP in preterm infants with
The actual pressures delivered were monitored close to the nares using a sensitive pressure monitor (HD755, Differential pressure manometer 0.5 psi, Extech Instruments Corporation, Nashua, NH, USA) for 5 min every 6 hours, and the average value of the …

Deflategate investigators say it doesn't matter which gauge was used
“The difference in the pressure drops between the two teams was found to be statistically significant regardless of the gauge used.” But why, when Anderson says his best recollection is that he used a gauge with a Wilson logo on it, does the …

Knowing Flow Meters

Saturday, June 20th, 2015

With technologies touching skies, innovations have increased making life easier day by day. There is no field that’s not touched by innovation. Be it a small calculator to the biggest aircraft every inch of our life is touched by innovation making things and tasks faster, easy and strain free.

We are surrounded by three major forms that are part and parcel of our life. These 3 forms are Solids, Liquids and Gases. Every form has a speed and velocity with which it moves and many a times, they are needed to be measured. There has been lot of technical developments in measuring instruments. When dealing in liquids, it becomes essential to measure their velocity. The instruments that measure the velocity of liquids are called flow meters.

As the need of flow meters increased in industries and various other reasons, many new flow meters with latest technologies have been introduced in the market. Let’s have a look at some of the latest flow meters:

1.  Ultrasonic Flow meter: Ultrasonic Flow meter is a measuring instrument that can measure the velocity of liquids and also has the capacity of measuring the velocity of gases that are in liquid state. Temperature, mass and thickness of the liquid or gas in liquid form has a great impact on the Ultrasonic Flow meter. They are highly user friendly and easy to handle. Ultrasonic Flow meters are highly useful with waste water application and they are so powerful that they can be used with dirty water or dirty liquids as well. This ability of Ultrasonic Flow meter makes it different from other flow meters. For better working of Ultrasonic Flow meter it is preferred to use them where one needs low pressure drops complemented with chemical compatibility and at the same time needs low maintenance. With innovation bringing improvements in every aspect, Portable Ultrasonic Flow meter entered the market which became extremely popular in the industries. The features of Portable Ultrasonic Flow meter are as follows:

a.  Rechargeable battery that provides power to the sensors and transmitter

b.  Built in data collector which enables the user to choose the option of recording signal strength, velocity and much such other information.

c.  Through USB stick one can transfer the recorded data into computer

d.  They are hassle free and can be easily installed and configured.

With so many features and high utility, Portable Ultrasonic Flow meters are quite popular in various industries and personal needs.

2.  Turbine Flow Meter: The process of converting mechanical action of a turbine moving in a circular path in liquid state around an axis into a decipherable rate of flow is done by turbine flow meter. Turbine flow meters are capable of measuring natural gas and liquid flow. A turbine flow meter though available in various sizes and specification, is generally made of stainless steel, bronze, cast iron and ductile iron.

There are various options available in the market for flow meters and depending upon the need and the place it will be used, buyers can get the best flow meters that best suit their need.

The site offers different types of Portable Ultrasonic Flow Meter to make your fittings proper. now you can avail good qaulity Ultrasonic Flow Meter and Mag Flow Meter easily.

Instruments and Methods for Pressure and Flow Calibration

Friday, June 19th, 2015

Pressure is an important process variable because it sets critical conditions for boiling, chemical reactions, distillation, extrusion, vacuuming, and conditioning of air. Incorrect pressure or flow rate can cause major safety, quality, and productivity problems. Very high pressure or flow rate inside a sealed environment can also cause an explosion. In order to ensure that plants operate efficiently and safely, periodic calibration of pressure, level, and flow instruments is required.

Many factories and metrology laboratories use various pressure and flow-meter calibration instruments. This high-accuracy equipment is used to calibrate industrial devices like pressure transducers, pressure gauges, and transmitters, as well as instruments that measure and control flow.

Some of the important types of devices used with pressure calibrators are:

1) Pressure gauges: They are instruments used to measure pressure in liquids and gases. Some of the commonly used pressure gauges are glycerin gauges, electric contact gauges, differential gauges, test gauges and capsule gauges. These are usually used in commercial production plants.

2) Calibration standard pressure sensors: These pressure sensors, usually consisting of differential pressure manometers, gauges, pressure controller, transmitters, and vacuum gauges are very precise and are sometimes used in calibration standard labs for secondary reference.

3) Pneumatic calibration hand pumps: These pressure calibrators manually produce air pressure set points. Then, these are used to calibrate pressure equipment with the help of a pressure indicator.

4) Pressure calibrators utilizing electrical measurement: These measure electrical current as well as voltage in order to show the output signal produced by a pressure transducer.

5) Digital test gauges: These gauges are installed on both hydraulic and pneumatic calibration hand pumps to determine pressures with precision.

6) Precision manometers: These pressure calibrators are handheld instruments, which provide a selection of pressure units. They are powered by batteries.

7) High pressure calibration hand pumps: These instruments produce pressure in order to calibrate a test gauge or connect to an indicator.

For any transducers or measurement systems, which provide information on the amount of material transferred in a given time, flow meter calibration is necessary. In flow-meter calibration, measurements usually occur in units of mass per unit time (gravimetric measurement) or volume per unit time (volumetric measurement). These two types of measurements relate to one another by the density (mass per unit volume) of the flowing material. This third method is called comparison measurement.

DH Instruments provides superior calibration solution through innovative technology, first rate service and uncompromising metrological integrity. It is a leading manufacturer of pressure calibrator, pressure monitor, dead weight tester, flow controller, flow calibrator, sonic nozzle and many other pressure & flow calibration equipments.

Stack Gas Flow Meter utilizes Torbar averaging pitot tube.

Friday, May 1st, 2015

Stack Gas Flow Meter utilizes Torbar averaging pitot tube.
December 4, 2013 – In addition to Torbar averaging pitot tube flowmeter, FPD581 StackFlowMaster consists of metering probe with optional integral components that include RTD temperature element, 5-valve manifold, multivariable transmitter, and purging …
Read more on ThomasNet News (press release)

systec Controls introduces integrating pitot tube
The company, which specialises in flow meters, manufactures teflon probes with reduced surface resistance for use under extremely corrosive conditions. These probes are particularly corrosion resistant. By doping the material with carbon, static …
Read more on Energy Global