Www.hvac.vn Electromagnetic Flowmeters The materials included in this compilation are for the use of...
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www.hvac.vn www.hvac.vn Electromagnetic Flowmeters The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within
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Transcript of Www.hvac.vn Electromagnetic Flowmeters The materials included in this compilation are for the use of...
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Electromagnetic Flowmeters
The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific,
written prior permission from Dwyer Instruments, Inc. ©Copyright 2014 Dwyer Instruments, Inc.
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Overview
Principles of OperationTypes of Electromagnetic Flow Sensors
InsertionIn-line
Installation AccessoriesRate and TotalizersAnalog Transmission
Target MarketsApplication Photos and Uses
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Overview
InsertionAdjustable
IEFS
Fixed EFS2
In-lineSmall
LOFM & MFS/MFS2
LargeFLMG
MFS
FLMG
MFS2
LOFM
IEFS
EFS2
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Principle of Operation
Faraday’s Law
Conductive liquid moving through a magnetic field produces a current
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Principle of Operation
Current is proportional to velocity of the liquid
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Principle of Operation
A magnetic field is directed through the conductive liquidVoltage generated is proportional to the movement of the flowing liquid
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IEFS - Introduction
Adjustable, insertion electromagnetic flow meterDesigned for pipe sizes from 3 to 48˝ ( 76 to 1219 mm)Comes in different materials
Stainless steel and brass
Purchase by size and material
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IEFS - Specifications
Service: Compatible clean or dirty non-coating, conductive liquidsRange: 0.28 to 20 ft/s (0.08 to 6.09 m/s)Accuracy: ±1% FSOutput: Current sinking, square wave pulse, opto-isolated, 550 Hz @ 20 ft/sEnclosure Rating: NEMA 4X (IP66)
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IEFS - Features
Field adjustability allows for quick ship and installation timeBrass and stainless steel materials of construction
Versatility for higher temperature and pressures and varying fluids
Reverse flow output optionAllows meter to indicate flow in two directions, forward or reverse
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IEFS - Features
NPT or Hot-Tap process connectionHot-Tap option allows for service of system without draining process fluid
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EFS2 - Introduction
Electromagnetic flow meterFixed insertion depth 1 to 12” (25 to 305 mm)PVC, Brass, and Stainless Steel
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EFS2 - Specifications
Service: Compatible clean or dirty non-coating, conductive liquidsRange: 0.28 to 20 ft/s (0.08 to 6.09 m/s)Accuracy: ±1% FSOutput: Current sinking, square wave pulse, opto-isolated, 550 Hz @ 20 ft/sEnclosure Rating: NEMA 4X (IP66)
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EFS2 - Features
Fixed depth3 models allow for range of pipe sizes
1 to 3” (25 to 76 mm)4 to 10” (102 to 254 mm)12” (305 mm)
PVC, Brass, and Stainless Steel Materials of Construction
Versatility for higher temperature and pressuresHigher chemical compatibility for varying fluids
Reverse flow output optionAllows meter to indicate flow in two directions, forward or reverse
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EFF Fittings
Series EFF fittings and tees required for installation
Stainless Steel, Bronze, and PVC fittings and tees allow for installation in virtually all applications
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Advantages and Disadvantages
IEFS2 – Adjustable
NPT and Hot Tap MountOne model for pipes 3 to 24” (76 to 607 mm)Higher Cost
EFS2 - FixedLower CostOperational in pipes down to 1” (25 mm)Require additional mounting components
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LOFM - Introduction
In-line, small pipe diameter electromagnetic flow sensorPVDF wetted material3/8” (9.5 mm) & ¾” (19 mm)
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LOFM - Specifications
Service: Compatible clean or dirty non-coating, conductive liquidsRange: 0.03 to 20 GPM (0.01 to 1.3 LPS)
Accuracy: +1% of readingOutput: Current sinking, square wave pulse, opto-isolated, 30 VDC @ 5 mA max. and 4 to 20 mAEnclosure Rating: NEMA 4X (IP66)
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LOFM - Features
Corrosion resistantPVDF material
No moving partsNon obstructive flowCan accurately measure flow rates as low as 0.03 GPM (.002 LPS)
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MFS & MFS2 - Introduction
In-line electromagnetic flowmeterFor small pipe sizesMFS 316 SS body
½ to 1” (13 to 25 mm)
MFS2 plastic body½ to 1-1/4” (13 to 32 mm)
MFS
MFS2
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MFS & MFS2 - Specifications
Service: Water and other conductive liquidsAccuracy: ±2% of readingOutput:
Frequency: Square-wave, NPNAnalog: 4 to 20 mA
Enclosure Rating: NEMA 4 (IP65)
MFS
MFS2
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MFS & MFS2 – Features
Compact designLow costNo moving partsIdeal for lower flowsLower pipe sizes
MFS
MFS2
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FLMG - Introduction
Inline electromagnetic flowmeterTransmits and displays flow rate and total150 # ANSI flange
4, 6, 8, 10 in (102, 153 ,203, 254 mm)
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FLMG - Specifications
Service: Compatible non-coating conductive liquidsWetted Materials: Liner: Dual durometer rubber
Accuracy: ±1% Output: Current sinking square wave pulse, opto-isolatedBattery Life: 2 months with power failure; 10 years with powerEnclosure Rating: NEMA 4X (IP66)
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FLMG - FeaturesNo Moving Parts
Unaffected by potential debris in flow such as sand
Manufactured to customer specificationModel designed to mount in 4 to 10” (102 to 254 mm) lines No adjusting sensor height to center of flow, bolt inline an go
Larger magnetic fieldRequires fewer upstream and downstream pipe diameters
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FLMG - Features
NEMA 4X (IP66) rated housingAllows for use both indoor and outdoor
Flow outputsRate and flow totalizing standard
Internal battery backup standardAllows unit to continue working if power failure/outage occurs
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Advantages and Disadvantages
In-line vs. Insertion Built to specific pipe size, one size does not fit all
Flow-thru design allows for minimal/no pressure dropCan be used in applications with solids and debris in flow streamHigher cost than insertion flow sensors
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Installation Accessories
RTI Rate/Total Indicator
BAT Blind Analog Transmitter
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RTI - Features
Indicator and transmitter accessory for IEFS, EFS2, and FLMGTakes pulse input from flow sensor and converts signal to display flow rate and totalDisplays flow rate and flow total on LCD displayProvides linear 4 to 20mA output of flowNEMA 4X (IP 66) rating for indoor and outdoor use
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RTI - Features
Mounts to wall, flow sensor, or local panel
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BAT - Features
Transmitter accessory for IEFS, EFS2, and FLMG
No Display, blind unit
Takes pulse input from flow sensor and converts signal to flow rate signal
Output signal linear 4 to 20mA output of flow
NEMA 4X (IP 66) rating for indoor and outdoor use
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BAT - Features
Mounts to wall or Flow Sensor
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When not to recommend electromagnetic flow sensors
Applications with fluids with low conductivity
De-ionized water or boiler feed waterLow conductivity can cause the meter to turn off and indicate zero flow
Hydrocarbon and gas applicationsHydrocarbons and gases are non conductive and can not be measured
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ApplicationsAgriculture
IrrigationSprayers and SpreadersFertigation
Building AutomationHVAC Systems
MunicipalitiesWater and Wastewater
Industrial ProcessChemical Metering Pumps
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Agriculture
IrrigationUsed for measuring and monitoring water consumed during growing season on pivot systems
SprayersUsed for monitoring chemical sprayed on crops during growing season
SpreadersUsed for monitoring flow of organic materials, including manure, used as fertilizer
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Building Automation
Water audits and consumptionUsed to verify water intake to building, verified against city municipality billing
LEEDUsed to verify water consumption for LEED credits in buildings for water conservation
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Municipalities
Wastewater FacilitiesUsed to measure treated and untreated sewageUsed to measure process waterUsed to measure chemical flow for sewage treatment
Water FacilitiesUsed for measuring flow in water mainsUsed for early indication of water main break
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Irrigation
Magnetic Flowmeter used for flow measurement in Pivot Irrigation system
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Spreader
Magnetic Flowmeter used in manure spreading system
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Fertigation
Golf course groundwater monitoring and fertilizing
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HVAC System
Magnetic Flowmeter used for billing in a heating system
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Water
Magnetic Flowmeter used in pump house for groundwater monitoring
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Wastewater
Gravity-fed waste pumping facility
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Industrial
Magnetic Flowmeter used in water park pump and treat
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The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2014 Dwyer Instruments, Inc.
