flow sensor

Coriolis Mass Flow Meter Rheonik RHM15

Diposkan pada November 10, 2016Juni 13, 2017 oleh Yugo Nugroho Boyolali

Rheonik Coriolis Flow Meter

The RHM 15 can measure flow rates up to 200 kg/ min (440 lb/min) with temperatures in excess of 350°C and pressures up to 540 bar. This model is truly a reliable solution, manufactured by Rheonik mass flow meter experts

Features
:

Standard pressure ratings up to 882 bar (12792 psi)
Temperature ratings from -196 to 350°C (-320 to 662°F)
Mass flow uncertainty down to 0.12%
Density uncertainty down to 0.5%
Repeatability better than 0.05%
Typical measuring ranges between 2 and 200 kg/min
Accurately measure low flow rates down to 1 kg/min
Unique robust torsion driven oscillation system
Process connection customization available
Minimum pipe footprint versions available
Approved for use in hazardous areas
Stainless steel case
Removable connection manifold version available for easy and efficient maintenance
Remote and compact transmitter versions available

Applications

Typical applications include:

• General Flow Control

• Additive Dosing

• Mixing and Batching

• Chemical Injection

• Package and Container Filling

Benefits
:

•
Torsion oscillator design assures a stable and drift free measurement with
excellent signal to noise ratios

• Resilient to external noise and vibration

• Insensitive to pipe pressure changes

• Robust tube wall thickness provides increased
operational safety in abrasive applications

• Long sensor life guaranteed due to low mechanical
stresses in the meter mechanism

• No moving parts to wear or fail

Part
Number Code

Gravity Mass Flow meter Rheonik RHM-08

Diposkan pada November 10, 2016Juni 13, 2017 oleh Yugo Nugroho Boyolali

RHM08
Rheonik Coriolis Mass Flow Meter
Versatile Coriolis
Mass Flow Meter

APPLICATIONS

Typical application include :

General Flow Control
High Pressure Gas Dispensing
Additing Dosing
Mixing and Batching
Chemical Injection
Package and Container Filling

FEATURES

The outstanding features include:

Standart pressure rating upto 1254 bar (11458 psi)
Temperature rating from -196 to 350 Deg C (-320 to 662 Deg F)
Mass flow uncertainly down to 0.10%
Density uncertainly down to 0.05%
Repeatability better than 0.05%
Typical measuring ranges between 0.5 and 50kg/min
Accurately measure low flow rate down to 300 g/min
Unique robust torsiondriven oscillation system
Process Connection customization available
Minimum pipe footprint versions available
Approved for use in hazarddous areas
Stainless steel case
Removable connection manifold version available for easy and efficient maintenance
Remote and compact transmitter versions vailable

ADVANTAGES

Torsion oscillator design assures a stable and drift free measurement with excellent signal to noise rations.
Resilient to external noise and vibration
Insensitive to pipe presssure changes
Robust tube wall thickness provides increased operational safety in abrasive applications
Corrosion resistant
Long sensor life guaranteed due to low mechanical stresses in the meter mechanism
No moving parts to wear or fail

Order Code Rheonik Coriolis Mass flow meter RHM08

Coriolis Mass Flow Transmitter

Kofloc Low-cost Mass Flow Sensor MODEL 3810S SERIES

Diposkan pada Oktober 17, 2016Juni 13, 2017 oleh Yugo Nugroho Boyolali

Low-cost
Mass Flow Sensor

MODEL
3810S SERIES

Designed
on the heritage base construction of the superior class bypass capillary type
mass flow sensor, the Model 3810S Mass Flow Sensor centers the focus on economy
through a thorough effort towards streamlining with the view to built-in
applications. The series is one of the KOFLOC best sellers and is used by many
assembly manufacturers as a substitute for the existing float type (tapered
pipe type) flow meter.

Features

-A low-cost, still, full-fledged sensor
based on a combination of the constant-current temperature difference detection
type with the bypass capillary type

-A large cost reduction makes Model
3810S almost rival any ex-isting float type flow meter in price.

-0 to 5VDC analog flow outputs provide
various applications such as measurements recording, control and alarm
issuance.

-The sensor is mass flow type. The user
needs no troublesome calculations for flow correction due to the effects of
tempera-ture and pressure.

Standard
Specifications

– Flow range (N2 equivalent, 20℃/1 atm) :

*10 SCCM–2 SLM (freely selectable)

*3 SLM–50 SLM (freely
selectable)

– Sensor : Thermal mass flow sensor

– Accuracy :

*±2%F.S. (25℃)

*±5%F.S. (25℃)

– Temperature coefficient :

*±0.15 F.S./℃ (15–35℃)

*±0.2 F.S./℃ (15–35℃)

– Repeatability : ±0.5%F.S.

– Proof pressure : 980 kPa (G)

– Allowable ambient temperature : 5–45℃

– Allowable ambient
humidity : 10–90% (No condensation allowed)

– Materials of parts in contact with gases
:

* Body: SUS303, PTFE

* Sealing: FKM (option: CR or NBR)

– Electric connection : 171826-5 (made by
AMP)

– Flow output signal : 0–5 VDC (External
load resistance: 250 kΩ or more)

– Power supply : ±15 VDC ±5%, 60 mA

– Joint (Main unit bore) : Rc1/4

– Weight :

* Approx. 250 g

* Approx. 350 g

Dimensions

!!NOTE!!
Specifications relating to the flow range (e.g., flow range, accuracy and
response) are expressed in N2 or air equivalent. The product will be built with
the primary pressure of 300 kPa or less and the secondary side open to the
atmosphere. For details on the pressure requirements, please contact us.

Note : The series 3810 pin
assigment has been modified from march 2000, and ia not compatible with the old
model. Please chec the following :

AMP171826-5 On The Connector 3810 side

Amp171822-5 on cable side

Flow Meter water iMAG 4700 Premium

Diposkan pada Mei 20, 2016Juni 13, 2017 oleh Yugo Nugroho Boyolali

The iMAG 4700 flow meter magnetic is the most economical flange electromagnetic flowmeter on the market produced by seametric instrument . With electrodes designed to discourage fouling, it is available in 4” to 12” pipe in municipal or industrial water, waste and reclaimed water, pump stations, and packaged plant applications. (For 3” version, see iMAG 4600-300.) Minimal straight pipe requirements allow.

Flow meter magnetic iMAG to be used in piping configurations where there is little space between the meter and an elbow.

Electromagnetic flowmeter iMAG 4700 are NSF-61 approved and are rated IP68 for applications where the meter may be operated under water to a depth of at least 10 feet (3 meters) continuously.

The display magmeter iMAG 4700 can be meter mounted or remote, and both rate and total indication are standard. Rate and total units and pulse scaling can be set via the front panel touch key pad by the user. Bidirectional flow is standard with forward, reverse and net flow.

A power/output cable imag water flow meter allows outputs for use with a variety of Seametrics inc USA and other displays and controls for remote reading and telemetry applications. Pulse output is standard on all models and 4-20mA passive current loop is standard on the iMAG 4700p. In addition, 4-20mA loop, HART protocol, high speed digital, and Modbus® protocol outputs are optional on the externally powered units, depending on model.

Features

Easy setup
Minimal straight pipe
Mounted or remote rate & total
Tamper-evident seal
NSF-61 approved
IP68 rated

Specification iMAG Water Flow Meter

iMAG Water Meter Accuracy

These magnetic flow Meter can be installed horizontally, vertically (with downward flow), or in any radial position. Using a check valve on the upstream side of the meter, and/or an air vent (vacuum relief valve) in the same, unobstructed run of pipe as the meter, is required in any installation where the meter may be exposed to suction when the system is not in normal operation. Suction can cause damage to the liner. Liner damage caused by suction, without the use of a check valve and/or air vent, may void the warranty.

iMAG 4700 Dimension

iMAG water flow meter straight Pipe Recommendations.

The iMAG magnetic flow meter requires straight pipe before and after the meter for best accuracy. However, the ability of electromagnetic meters to average the flow across the entire pipe allows for shorter straight pipe recommendations than most mechanical meters

Pulse Output Configuration.

A pulse output is standard on all models. Since this is an isolated output, the external equipment must include a DC power source to regenerate the pulse from the open-collector output (transistor equivalent of a contact closure). A pull-up or pull-down resistor may be needed if not included in the user equipment as shown in the diagrams.

Both the power source and resistor may be supplied internally in some types of control and monitoring magnetic flow meter devices. If not, as for most PLC discrete input modules, they must be added externally at the module input terminals. The pulse output rate in volume units/pulse can be set by the user via the SET P tab on the meter’s setup menus.

iMag Flow Rate Table

Battery Powered Units

The iMAG 4700 flow meter can come configured with two replaceable 3.6V lithium ‘D’ batteries. In this configuration, the only option/output is the scaled pulse output which comes standard. The scaled output for the battery powered option has a maximum pulse rate of 150 pulses/second, with a fixed pulse width of 2.5ms. Be sure to set your P value such that the meter will function properly over the flow range in your flow meter application. The sample rate of the meter is user selectable through the SAMP tab in the meter’s sub-menu. Sample periods of 1/5, 1/3, 1, 3, 5, 15, 30, and 60 seconds can be selected. Larger sample periods will yield longer battery life but slower response time. Care must be taken to select a sample period that is suitable for your application. See the table below for the expected battery life as a function of sample period

Thermal Mass Gas Flow Meter

Diposkan pada Februari 16, 2015 oleh Yugo Nugroho Boyolali

Siargo specializes MEMS flow sensing technology and manufactures MEMS flow sensors, modules, and system products that are shipped worldwide. Our global technical team is working 24/7 and ready to provide timely solutions to your even very special requirements.

Our patented low power and integrated flow system technology and know-how excel in many applications for flow measurements. We are committed to meet our customers needs and offer the value-added features at a very competitive cost. Achieved by our proprietary MEMS integration and package technology, the sensors can measure gas flow in a pipe diameter from 0.5 mm up to 2 m and with a flow speed from 5 mm/sec up to 75 m/sec without sacrificing measurement accuracy.

Our products have been deployed to utility gas metering, automotive applications, medical gas sensing, food and pharmaceutical industry gas management, environmental and analytical instrumentation, to name just a few.

Innovation continuously leads the product technology

Quality precisely ensures the product performance

Service timely provides the product technical supports

The MEMS flow sensors bear a number of merits compared to the traditional thermal mass flow sensors. It is because not only the sensor manufacture process ensures a Thigh degree of consistency among each individual sensor, but also the process allows integration of additional features that could significantly enhance the functionality and extend the application scopes.

MEMS mass flow sensors have become one of the choices for flow measurement since 1980s. Up to date, the applications are however applicable to clean gases with a limited measurable flow speed. Since its inception in the earlier 2004, Siargo has been dedicated to develop state of-the-art MEMS mass flow sensors as well as its package technology aiming to enhance the product performance, functions as well as reliability. Our sensors focus on the innovative integrations and product performance that enables various applications in many challenging circumstances.

Our flow sensing products feature :

Integrated multiple mass flow sensors with extended dynamic rangeability

Ultra low power consumption

High sensitivity at low flow regime

Innovative package technology that provides self-flow conditioning

Standard and user friendly interfaces

Low pressure loss

Easy and ready for networking

User friendly installation

Ex ia IIC T4 / Ex d IIB T4 and up to IP66 rating

INLINE MASS FLOWMETER

MF Series In-line Mass Flow Meters are designed for all purpose industrial gas metering and control. The meters provide direct mass flow information as well as well-designed user friendly interfaces (RS485/4~20mA/pulse etc.) for data process. The series cover the DN range from 25 to 100 mm with an accuracy of ±(1.5+0.5FS)% or better depending on the requests. The meters can work at an environment of -20 to 60°C and pressure up to 1.5 MPa. The package ensures hygienic safety and can be used for beverage and food industrial gas process such as CO2. Other applications include special gas monitoring in steel process, hydrogen flow control in chemical industry, process gases (oxygen, nitrogen, helium, compressed air or argon) monitoring in manufacture, to name a few.

MF – SERIES

INSERTION MASS FLOWMETER

MFI Series Insertion Mass Flow Meters are designed for gas monitoring and control in a large pipe line where installation of an in-line flow meter is either difficult or costly. The insertion meters are equipped with a self-sealed valve and hence provide a solution that only requires minimal interruption to the normal working circumstance. The suggested starting metering DN is 150 mm and above. All of the insertion meters have an accuracy of ±(1.5+0.5FS)% or better depending on the requests. The meters can work at an environment of -20 to 60 °C and pressure up to 1.5 MPa. Applications include but not limited to oxygen, nitrogen, methane, and compressed air flow monitoring for manufacture process control.

MFI – SERIES

MASS FLOWMETER

MF5700 Series Mass Flow Meters feature cost effective ultra low power operating on 4 AA batteries. The portable design has excellent exchangeable mechanical adaptors, easy data accessible and user programmable capabilities. The internal data storage can also help for many industrial on-site applications. The meters can be customized for various general purpose flow applications.

MF5700 – SERIES

MASS FLOWMETER

MF5000 Series Mass Flow Meters are specially designed for small pipe flow monitoring and control. The series can measure gas flow in a pipe diameter as small as 3 mm, but not over 19 mm. With the self-flow conditioning feature of the MEMS sensor package, the meters feature an extremely low pressure loss compared to the traditional by-pass thermal mass flow meters in this application scope. The accuracy of the meters are generally ±(1.5+0.2FS)% or better depending on the requests. The meters can work at an environment of -20 to 60°C and pressure up to 1.5 MPa. Applications include semiconductor gas process monitoring and control, hospital oxygen gas monitoring, etc.

MF5000 – SERIES

MASS FLOWMETER

MF5600 Series Mass Flow Meters are specially designed for applications where the display is often required to be placed separated away from the flow channel or meter body, such as the oxygen metering system in a hospital. These meters are opted with the standard industrial user interfaces (RS485 and 4 ~ 20mA), and user defined alarm functions for better monitoring or control over the network. The off-the-shelf products (MF5612 and MF5619) are for gas flow measurement of 0 ~ 300 SLPM and 0 ~ 800 SLPM, respectively

MF5600 – SERIES

OXYGEN FLOWMETER

MF5200 Series Oxygen Flow Meters are specially designed for oxygen metering system in a hospital. These meters are operated with the standard industrial user interfaces (RS485), and user defined alarm functions for better monitoring or control over the network. The off-the-shelf products (MF5212 and MF5219) are for gas flow measurement of 0 ~ 300 SLPM and 0 ~ 800 SLPM, respectively.

MF5200 – SERIES

MASS FLOWMETER

MF4000 Series Mass Flow Meters are designed for applications where manifold flow measurements. The standard flow channels are 3 mm and 8 mm in diameter, respectively. Plastic finishing with an easy change of the mechanical adaptors enables applications at a low cost and different environments. The meters can be used for process gas control, environmental samplers and many other industrial applications.

MF4000 – SERIES

LOW PRESSURE – MASS FLOWMETER

MF-GD Series Low Pressure Mass Flow Meters are designed for all low pressure industrial gas metering and control. The meters substantially reduce the installation cost as well as other logistical cost. In addition, the all electronicmeters provide easy data access as well as remote data networking capabilities.

MFGD – SERIES

Insert Flow Meters

Diposkan pada Oktober 5, 2012Juni 13, 2017 oleh Yugo Nugroho Boyolali

Insert Flow Meter

EX80-Series		Downloads
	Fixed Depth Insertion Magmeter • Low-flow performance and accuracy superior to any mechanical flow sensor • No moving parts to wear out • Dedicated fittings for simple installation • Retainer clip automatically sets correct depth • Meter extends only ~1/8 of pipe diameter, minimizing potential for clogging with debris • Simple pulse train output can be used with any SeaMetrics signal processing module, or sent directly to a PLC • Available for pipe sizes 1″ to 10″, in Brass, 316 Stainless, PVC, and CPVC


EX100/200		Downloads
	The complete lack of moving parts of the EX100/200-Series insertion flow sensor is the source of its reliability. Brass and stainless steel models withstand a variety of temperature, pressure, and chemical conditions. The EX-Series has no rotor to stop turning in dirty water and there are no bearings to wear out.


IP80		Downloads
	The IP80-Series are impeller (or “paddlewheel”) insertion meters designed for use with a wide variety of liquids in pipe sizes 1/2″ to 8″. Sensors are available in brass, 316 stainless steel, PVC, and polypropylene. Bodies are machined from a solid rod for maximum precision. High-quality jewel bearings and nickel-bound tungsten carbide shafts are used for extreme low friction and long life.


IP100/200		Downloads
	The IP100/200-Series are adjustable depth insertion paddlewheels that come in brass or 316 stainless models to fit 3” to 48” pipe. Installation fittings are standard 1-1/2″ (101/201) or 2” (115/215) NPT. Fittings such as saddles and weldolets may be purchased either locally or from SeaMetrics.


TX80		Downloads
	The TX80-Series are insertion turbine meters designed for use in 1-1/2″ to 8″ pipe. High-quality jewel bearings and precision shafts ensure long life and low friction. Available in 316 stainless steel, brass, PVC and polyprolylene, sensor bodies are machined from solid rod for maximum low-flow performance. The TX80-Series use special fittings that ensure ease of installation and correct depth setting in the pipe.


TX100/200		Downloads
	The TX100/200-Series are adjustable depth insertion turbines that come in brass or 316 stainless models to fit 3” to 48” pipe. Installation fittings are standard 1-1/2″ (101/201) or 2” (115/215) FNPT. Fittings such as saddles and weldolets may be purchased either locally or from SeaMetrics.


Fittings for 80 Series		Downloads
	SeaMetrics insertion meters must be seated in fittings that match the pipe size and material.

Diesel flow meter

Diposkan pada Oktober 29, 2011Juni 13, 2017 oleh Yugo Nugroho Boyolali

Diesel Flow Meter
Fuel Flow Meter
Flow meter solar
Flow meter genset

Diesel fllow meter atau engine flow meter merupakan flow meter guna memantau besarnya flow rate dan sekaligus banyaknya fuel oil atau solar yang telah digunakan oleh engine ataupun diesel.

Flow meter untuk mendeteksi aliran solar atau fuel ini banyak sekali pemakainya seperti untuk transportasi, boiler, alat berat maupun generator set.

Dengan di pasang flow meter pada alat berat ataupun transportasi besarnya bahan bakar solar yang telah digunakan oleh engine bisa diketahui dengan aktual.. Seperti yang banyak diketahui bahan bakar solar harganya cukup mahal sehingga perlu dilakukan pengecekan kebutuhan rutin dari solar untuk oprasional alat berat ataupun alat transportasi. Hal ini guna menghindari pemborosan pengunaan solar yang salah satunya diakubatkan oleh ulah nakal para sopir. Karena itu guna memantau penggunaan kebutuhan solar secara faktual adalah dengan memasang flow meter sehingga kebutuhan aktual dari bahan bakar dapat diketahui seakurat mungkin. Karena pemantauan kebutuhan solar tidak bisa hanya didasarkan pada jarak perjalanan ( Kilo meter ) hal ini dikarenakan kemacetan jalanan yang makin parah membuat akurasi kebutuhan bahan solar berdasarkan kilometer tidak bisa dipertanggung jawabkan.

Bahkan untuk peralatan tertentu seperti truk mixer beton, mobile crane, forklift dan lainnya justru pada saat peralatan tersebut berhenti/tidak bergerak justru banyak membutuhkan bahan bakar karena mesin/engine/diesel dari alat tersebut tetap hidup dan butuh bahan bakar sehingga berapa besar kosumsi bahan bakar yang telah digunakan oleh alat berat tersebut dapat di pantau secara aktual lewat flow meter yang diapasang di mesin..

Flow meter diesel ini harus mempunyai spesifikasi sesuai dengan jenis alat berat yang digunakan dan juga berdasarkan kapasitas atau besarnya power dari engine/diesel . Dan yang perlu diperhatikan sumber energi guna mengaktiflkan flow meter diesel kebanyakan tegangannya adalah DC.

Installasi flowmeter ini untuk flow sensornya di pasang di jalur aliran solar setelah fuel filter sedangkan untuk indicator bisa dipasang di dashboard dekat pengemudi. Sistem pemasangan flow sensor solar dengan menggunakan fiting dan bisa dihubungkan ke selang solar.dengan menggunakan clamp.

Kelebihan dan kekurangan Electromagnetic Flow Meter

Diposkan pada Juli 29, 2011Juni 13, 2017 oleh Yugo Nugroho Boyolali

Flow meter
Magmeter
Magnetic Flow Meter

Electromagnetic flow meter merupakan flow meter yang telah dikenal luas dan karena sifatnya yang simple dan mudah pemakainnya serta akurasinya yang tinggi, flow meter electromagnetic banyak sekali digunakan untuk mengukur aliran fluid yang mempunyai konduktivitas. Electromagnetic flow meter yang cara kerjanya didasarkan hukum faraday induksi electromagnetik ( Faraday’s law of electromagnetic induction ) mempunya beberapa keunggulan dan kekurangan, dimana keunggulan dari jenis flow meter electromagnetic ini adalah tidak adanya partikel/komponen yang bergerak dalam tabung electromagnetic flow meter membawa keuntungan bahwa aliran dari fluida yang kotor ataupun mengandung partikel padat atau serat seperti pada proses bubur kertas atau serat nabati atau lainnya cukup cocok menggunakan jenis flow meter electromagnetic ini.

Karena cara kerja Flow meter electromagnetic dalam mengukur besarnya flow rate berdasarkan penampang sehingga membawa keuntungan tidak adanya pengaruh besar/kecilnya pressure, dan karena tidak adanya sensor bergerak karena bersentuhan dengan fluida membuat sensor mempunyai umur yang relativ lebih lama.

Submersible Flow meter

Karena yang bersentuhan dengan aliran fluida adalah linning tube dan sebagian kecil sensor magnetic dengan cara memilih jenis bahan electroda dan linning yang sesuai dengan aplikasi pada jenis fluida, maka bisa dipastikan electromagnetic flow meter tahan terhadap abrasi dan korosi.

Sementara itu flow meter electromagnetic tidak akan memberikan hassil pengukuran untuk fluid yang tidak mengandung konduktifitas yang telah dipersyaratkan. Begitu juga untuk cara pemasangan electromagnetic flow meter harus diperhatikan pada jarak karena adanya peningkatan luas penampang pipa atau aliran yang terjadi back pressure atau karena adanya perpindahan aliran berupa aliran pipa karena sudut atau tikungan begitu juga pada pemasangan pipa dengan arah menurun. Karena itu menghadapi hal seperti ini bisa disiasati dengan beberapa cara seperti yang di persyaratkan oleh manufacture magnetic flow meter tersebut. Sedangkan terhadap kecepatan aliran ( jarak/waktu atau m/s ) pengukuran flow rate dan totalizer dari fluid yang mengalir mempunyai batasan yang ditentukan oleh manufacture dimana hal ini akan berpengaruh pada akurasi flow meter.

Aplikasi electromagnetic flow meter untuk proses waste water yang pada beberapa proses yang mengalirkan fluid tanpa menggunakan tekanan atau tanpa adanya pompa melainkan dengan mengandalkan gerak gravitasi electromagnetic flow meter dan digunakan dengan jenis submersible flow meter dengan sistem installasi yang perlu dilakukan modifikasi. Modifikasi cara instalasi electromagnetic flow meter untuk aliran fluid gravitasi hendaknya diperhitngkan dengan cermat untuk menghindari adanya atau terjebaknya udara atau gas dalam sistem. Dan model electromagnetic flow meter yang cocok yaitu jenis submersible dengan display terpisah dan sistem koneksi electric menggunakan jenis water proof atau IP68.

Info lebih lengkap klik : Cara Install Magnetic Flow Meter

Cara Install Electromagnetic Flow Meter

Diposkan pada Juli 23, 2011 oleh Yugo Nugroho Boyolali

Flow Meter
Magmeter
Magnetic Flow Meter
Electromagnetic Flow Meter

Flow meter electromagnetic merupakan flow meter yang mengacu pada hukum faraday dimana pada perhitungan utamana didasarkan pada pengukuran gerakan konduktor yang didasarkan pada perhitungan alogaritma yang mencakup luas penampang yang dilalui oleh liquid dalam suatu area yang mempunyai induksi elektromagnetik. Karena itu sangat penting dalam menentukan pola installasi untuk mencegah tidak penuhnya luasan penampang perhitungan. Karena itu untuk menghindari adanya tekanan balik dan rongga udara dalam suatu penampang electromagnetic flow meter disyaratkan adanya jarak masuk dan jarak buang dari liquid yang mengalir kedalam sensor electromagnetic flow meter.

Karena itu sebelum memasang flow meter electromagnetic perlu di perhatikan persyaratan installasi dari manufacture dan ini biasanya terdapat dalam amnual book flow meter. Umumnya pemasangan ini didasarkan pada kelipatan diameter pipa / size dari magmeter bisa dipasang sejauh 5 x diameter pipa untuk menghindari efek dari turbulen karena adanya back pressure maupun peningkatan atau pengurangan besrnya pressure dikarena adanya reduksi ataupun peningkatan diameter pipa yang dipasang. Karena hal ini bisa berpengaruh pada akurasi pembacaan alat flow meter electromagnetic.

Namun demikian hal utama yang harus diperhatikan dan hal ini sering diabaikan yaitu tidak menginstal electromagnetic flow meter di dekat medan magnet yang kuat karena hal ini akan mengganggu operasi. Generator semacam medan magnet yang transformer, motor listrik atau HV atau sirkuit arus tinggi.

Hal kedua adalah menghindari gelembung udara atau gas dalam cairan yang akan diukur oleh electromagnetic flow meter. hal ini karena berkaitan dengan perhitungan yang didasarkan pada hukum faraday electromagnetic. Hal ini terkadang menjadi masalah dalam kondisi posisi arah aliran yang rendah seperti sistem gravitasi atau dekat katup udara pada installasi pompa. Oleh karena itu untuk memastikan tidak adanya gelembung udara dalam aliran liquid pada pipa ada baiknya installasi pipa dibuat miring sedikit mungkin bisa di buat kemiringan 3 derajad untuk memastikan adanya gelembung udara yang terjebak dalam pipa bisa keluar dengan mudah. Karena itu perlu adanya Prosedur installasi flow meter electromagnetic agar supaya tujuan dari pemasangan flow meter electromagnetic ini dapat tercepai.

Info lainnya klik : Cara Memilih Type Flow Meter

Water Flow Meter

Diposkan pada Juni 28, 2011Juni 13, 2017 oleh Yugo Nugroho Boyolali

Water flow meter atau liquid flow meter atau Flow meter air ada beberapa type yang bisa digunakan disesuaikan dengan jenis fluid yang mengalir dan fungsi flow meter air sendiri. Yang dimaksud dengan flow meter air atau water flow meter atau water meter adalah jenis liquid yang mana basenya adalah water.

Pada dunia industri manufacture, oil and gas, pertambangan, perhotelan, rumah sakit dan lainnya water flow meter atau flow meter air atau liquid flow meter ini dapat dikelompokan pada jenis liquid air dan prosesnya :

– Flow meter limbah

– Chemical flow meter

– Flow meter air bersih

– Flow meter air murni ( demin water )

– Raw water Flow Meter

Ada beberapa jenis flow meter yang aplikasinya cocok digunakan pada jenis fluid diatas dimana tetap mengacu pada cara kerja flow meter dan juga pada aplikasi yang diinginkan oleh para pemakai flow meter. Untuk Flow meter yang sering digunakan adalah :

– Flow meter electromagnetic / Mag Flow Meter

– Turbine Flow meter
– Ultrasonic flow meter
– Woltman Flow Meter
– Padle Flow meter

Untuk jenis Fluid yang basenya water yang mengandung kotoran baik itu kotoran limbah maupun karena raw waternya seperti air dari sungai karena adanya kotoran sampah atau pasir, mungkin jenis flow meter yang cocok adalah Jenis Flow meter yang tidak mempunyai komponen yang bergerak dalam sensornya atau bisa juga untuk jenis flow meter yang tidak mempunyai contact langsung dengan liquid. Dimana untuk kedua jenis flow meter ini karena sifat dan cara kerja flow meter membuat karakteristik sensornya akan lebih awet dan akurasinya lebih terjamin karena tidak terpengaruh adanya kotoran-kotoran dalam fluid. Namun demikian karena sifat dan karakteristik kerja flow meter ini menuntut adanya kesempurnaan aliran, seperti tidak boleh adanya rongga-rongga udara karena akan dibaca sebagai aliran palsu ,yang menyebabkan sensor tidak mampu membaca dengan baik, kecuali jenis dopler ultrasonic yang harganya sangat mahal. dan untuk electromagnetic flow meter cukup banyak disukai karena akurasinya cukup memadai dan harganya juga tidak mahal walaupun ada kelemahan disebabkan jika aliran fluida terjadi turbulen. Namun demikian untuk mengatasi turbulen pada jenis electromagnetic bisa juga aplikasinya dengan menggunakan air drain ( pembuangan udara ) yang bisa dipasang setelah electromagnetic flow meter.

Sedangkan untuk fluida dengan base water namun mempunyai PH atau tingkap keasaman atau kebasan terlalu ekstrim, selain digunakan ultrasonic ( non contac ) bisa juga digunakan electromagnetic dengan bahan non metal ( Plastic atau PVC) atau jika fluid tersebut bersih bisa juga digunakan jenis flow meter turbine dengan bahan dari PVC atau mungkin bisa digunakan matrial stainless steel 316L. Dengan karakteristic elecromagnetic flow meter yang tidak mempunyai bagian/part yang bergerak dalam tabung flow meter, type electromagnetic flow meter ini cocok sekali jika dipakai untuk fluida / cairan yang tidak bersih / kotor, baik itu karena adanya kotoran berupa serat, getah, pasir ataupun rumput dan kotoran lainnya sepanjang cairan tersebut mengandung conductivity yang di persyaratkan.

Pada dasarnya hampir semua jenis flow meter dapat digunakan untuk aplikasi flow meter yang menggunakan dasar air. Namun demikian pemilihan jenis flow meter tetap di pertimbangkan agar kita bisa mendapatkan jenis flow meter yang sesuai dengan aplikasi yang kita perlukan dengan pertimbangan kecocokan akurasi dan biaya yang di keluarkan baik biaya maintenance maupun harga flow meter nya itu sendiri. Jenis flow meter atau type flow meter yang sering digunakan dalam dunia industri untuk flow meter dengan liquid air adalah :
– Turbine flow meter
– Magnetic Flow meer
– Ultrasonic Flow meter
– Vortex Flow meter
– DP Flow Flow meter
– Woltman type water meter