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The ST50 Flow Meter is an accurate, easy to install, no moving parts solution for measuring and controlling air, compressed air and nitrogen flow. ST50 utilizes FCI proven thermal dispersion technology to provide direct mass flow measurement resulting in higher performance at a lower cost than orifice plates, DP, Vortex shedding and other thermal devices. The meter installs in line sizes ranging from 2 to 24 inches [51 to 610mm] with 1/2" or 3/4" NPT.
The ST50 uses precision, lithography structured platinum RTD sensors embedded in FCI's equal mass small diameter, all metal thermowells. Combined with microprocessor electronics and precision calibration, the ST50 achieves excellent accuracy, fast response and virtually maintenance free operation.
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AALBORG®'s GFC LOW COST self-contained ANALOG THERMAL MASS FLOW CONTROLLERS are designed to accurately measure and control the flowrates of gases. CONTROLLERS are constructed of rigid metallic components. Nylon is not used. Flowrates are unaffected by temperature and pressure variations.
Stainless steel models have wetted parts of stainless steel. Aluminum models have wetted parts of aluminum, brass and stainless steel. O-rings are VitonTM.
Local setpoint adjustments are conveniently accessible from the outside. External set point adjustments of the control valve are facilitated through a 15 pin D-connector. Control valves are normally closed proportionating electromagnetic valves.
A tiltable LCD readout is built into the top of the meter. Readings are in direct engineering units in terms of specific gases. Remote reading installations are possible by means of an optional extension wire supplied with a modular phone plug. Conveniently overlapping flow ranges.
SPECIFICATIONS
Accuracy: ± 1.5% of full scale.
Repeatability: 0.5% of full scale.
Maximum Flow: 1000 sL/min [N2].
Response Time: Typically 2 seconds to within ± 2% of flow setting.
Maximum Gas Pressure: 500 psig / 34.5 bars.
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The Brooks line of analog thermal mass flow instruments is designed to meet the rigorous demands of our customers’ established and newly developing process applications. These devices continue to add to their expansive installed base due to their fast response, excellent accuracy, and simple integration. Features include: years of field-proven reliability; analog I/O allows for quick and easy system integration; elastomer seals option provides exceptional leak integrity and maximizes control valve shutoff dependability; ultra-high purity (UHP) and metal seal options ensure clean flow paths for contamination sensitive processes. Globally approved for a variety of service areas.
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KOFLOC 3660, 3665
The KOFLOC Standard Mass Flow Controller MODEL 3660 SERIES is a low-cost, general-purpose gas mass flow controller. The differentiating factor of the MODEL 3660 SERIES is its numerous variants and options, a room for customization at affordable cost. It has gained wide acceptance and solid reputation for its flexibility. MODEL 3660 SERIES is now in use as a component for Sputter deposition, bond wiring, welding and washing equipment in semiconductor industry, as well as for scientific and analytic purposes such as in thermal analysis and vacuum equipment. The MODEL 3660 and its numerous variants are also capable of meeting many unique industrial needs as the mass flow controller in industrial applications, including gas mixing, air sampling, burn control and more.
FEATURES
- Rohs compliance - SUS316 stainless steel - Unidirectional normally closed valve
- Highly reliable solenoid actuator - Compact & Low-Cost - Free mounting position
- Quick response - Low pressure-differential variant model
APPLICATIONS
- Air sampling - Analyzer component - Bioreactor
- Biotechnological process - Burn control - CCFL manufacturing
- Chamber pressure control - Chemical process - Environment monitoring
- Electronic device manufacturing - Food production - Fuel cell testing
- Fermentation process - Gas applications - Industrial furnace
- Leak testing - Pharmaceutical process - Pollution monitoring
- Process flow control - R&D - Solar power element manufacturing
- Secondary calibration reference - Semiconductor process - Sputter deposition
- Surface treatment process - Thermal flame spray - Thin film manufacturing
- Vacuum apparatus - Vapor deposition
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Digital alternative for a VA meter with totaliser and alarm functions.
MASS-VIEW(r) has an OLED display showing:
- actual flow rate (bar graph and actual value or percentage)
- desired flow units
- type of gas (7 pre-installed gases)
- totalized flow
- min. and/or max. alarm
Other features are:
- Freedom from parallax error
- Virtually independent of pressure and temperature variations
- Low pressure drop
- Wide flow ranges
- Fast response
- High accuracy
- Alarm and counter functions (2 alarm contacts available on meters)
- Analog (0..5 Vdc) and digital communication (Modbus-RTU, RS-232 interface)
- Configurable password protection
- 7 pre-installed gases available (Air, N2, O2, CO2, Ar, CH4, C3H8) or He or H2
- 4 selectable ranges (100%, 50%, 25% and 10% of maximum fullscale range)
- Digitally calibrated
- 3 year warranty
You can order these instruments online and your order is shipped within two working days.
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The SDP1000 family of differential pressure sensors provides precise differential pressure measurement with an analog 0 to 4 voltage output. It is available in several ranges up to 3’500 Pa (14 inch water) and measures even miniscule pressure differences below 0.1 Pa (0.0004 inch water). Mounted in a rugged, chemically inert PPS housing the differential pressure sensors feature high dynamic range and long-term stability. The SDP1000 series is an ideal choice for demanding medical and HVAC systems. Superior performance and simple operation help minimize design effort.
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Our 100 Series family of mass flow controllers are one of our finest technical achievements in over 35 years in the mass flow instrumentation business. Our 100 Series is designed so the physics are correct! Our 100 Series Premium Digital family is made up of our flagship Smart-Trak® Model 100 , our highly engineered ultra-low flow solution Micro-Trak™ Model 101 and our NEMA 6 & IP67 industrial MFC, the Max-Trak™ Model 180 . Excellent accuracy and repeatability coupled with unsurpassed instrument stability result from a patented, inherently linear design, advanced platinum sensor technology, and a valve that is strong, flexible and forgiving. Our 100 Series family of instruments has raised the bar and set a higher standard in the Performance MFC marketplace.
UQNIQUE PRODUCT FEATURES
- Accuracy of +/- 1% of full scale
- Accuracy of +/- 0.7% of reading +.3% of FS
- 316 stainless steel construction
- Flow ranges from 0 to 10 sccm to 0 to 1000 slpm.
- Fast-response control valve
- True digital performance with great flexibility
- “Primary Standard” calibration& NIST traceability
- Dial-A-Gas® Technology: 10 pre-programmed gases come standard
- Small footprint makes drop-in replacement easy
- Single-sided 24 VDC power supply
- CE approval
- MAX TRAK is Industry’s only NEMA 6/IP67 industrial MFC provides wash down protection eliminating secondary enclosures
-- MICRO-TRAK Suitable for most gases with flow rates down to 0.1 sccm (smlm)
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Gas Flow Meters with standard digital and analog output
The thermal mass flow meters and controllers of the smart series are especially well suited for measurement and control applications in industry and process as well as for customer-specific OEM applications. The products are provided with a multitude of features which can be easily optimized to meet a customer’s individual requirements.
Instrument versions
standard: The economic solution
(Accuracy +/- 1,5% of full scale, Turndown ratio 1 : 30)
hi-performance: With highest accuracy and turndown ratio
(Accuracy +/- 0,3% of full scale and +/- 0,5% of reading, Turndown ratio 1 : 100)
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AALBORG®'s enhanced model GFM is a low cost, self-contained THERMAL MASS FLOW METER designed to accurately measure the flowrates of gases.
A tiltable LCD readout is built into the top of the meter. Readings are in direct engineering units in terms of specific gases. Remote reading installations are possible by means of an optional extension wire supplied with a modular phone plug.
Flowrates are unaffected by temperature and pressure variations.
Aluminum and stainless steel models are offered. Zero and span adjustments are conveniently accessible from the outside, a dip switch is added for external adjustment of decimal point of the LCD readout.
Optional rechargeable battery kit is available for portability.
SPECIFICATIONS:
Accuracy: ± 1.5% of full scale.
Repeatability: ± 0.5% of full scale.
Maximum Flow: 1000 sL/min [N2].
Response Time: Typically 2 seconds to within ±2% of flow setting.
Maximum Gas Pressure: 500 psig / 34.5 bars.
Time Constant: 800ms
Transducer Input: ± 12 Vdc; 200 mA maximum.
Output Signal: 0 - 5 Vdc or optional 4 - 20 mA
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The Brooks® line of analog thermal mass flow instruments is designed to meet the rigorous demands of our customers’ established and newly developing process applications. These devices continue to add to their expansive installed base due to their fast response, excellent accuracy and simple integration.
* Years of field-proven reliability
* Analog I/O allows for quick and easy system integration
* Elastomer seal option provides exceptional leak integrity and maximizes control valve shutoff dependability
* Ultra-high purity (UHP) and metal seal options ensure clean flow paths for contamination sensitive processes
* Globally approved for a variety of service areas
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KOFLOC 3810DS
The KOFLOC Mass Flow Meter MODEL 3810DS SERIES is a low-cost mass flowmeter with a digital display; based on the time-tested MODEL 3810 SERIES mass flow meter. Compact and lightweight, it requires no calibration and comes with 2-point alarm output. When used with the optional precision needle valve, it can serve as a low-cost alternative to more expensive mass flow controllers, especially in applications where attaining the optimum flow requires expert tweaking that cannot easily be simulated by rougher control offered by common mass flow controllers.
FEATURES
Rohs compliance Precision needle valve Easy maintenance
Digital flow indicator Single 24 VDC power source No caliberation require
SUS316L / Teflon® wetted parts
APPLICATIONS
Analyzer component Environment monitoring Leak testing
Biotechnological process Food processing Pharmaceutical process
Burn control Fuel cell R&D
Chemical process Gas applications Semiconductor process
Chamber pressure control Industrial furnace Solar power element
CCFL (Cold Cathode Fluorescent Lamp)
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Know your flow.
The electronic flow monitor from SIKA monitors liquid flows for failure to reach a specified flow rate.
The VE monitor works on the calorimetric principle. It has no moving parts even flows with entrained solids can be checked.
The monitor is of robust design, is uncomplicated to operate and is highly reliable.
The VE monitor affords you a dependable and inexpensive way of protecting your installations and machines from expensive damage.
The flow monitor screws easily and directly into the process line by means of a connecting thread. Since the measuring probe is available in two lengths it covers a wide range of pipes of various nominal diameters and wall thicknesses.
In addition, the flow monitor is available in two versions:
the VES compact version
Here the flow sensor and the corresponding evaluation electronics form a single unit. This means that flow can be monitored directly at the point of measurement.
the VEG remote reading version
he flow sensor installed in the pipe is connected to the evaluation electronics by a connecting lead. The electronics unit has been designed for installation on a mounting rail. This means that several points of measurement can be monitored from a central location.
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OMNI - F
The calorimetric principle of flow monitoring is based on two temperature sensors. One of these sensors is hearted constantly so that there is a constant difference in temperature between the two temperature sensors when the metering material is at a standstill
calorimetric
nominal diameter from DN 10
Ranges 1-150 cm/s
Pressure range PN 200
Temperature max. 70 °C
Stainless steel material
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Calorimetr. Flow Monitor KAL-D
Calorimetric Flow Monitor KAL
Calorimetric Flowmeter /- monitors KAL-K
Calorimetric Flow Monitor f. Gases KAL-L
Calorimetric Flowmeter,-switch,-totalizer DVK
Differential Pressure Flowmeter RCD
Mass Flowmeter and /-controller for Gases MAS
Mass Flowmeter and /-regulator for Gases DMS
Mass Flowmeter for Gases MFC
Mass Flowmeter and /-regulator for Gases DMW
Therm. Mass Flowmeter for Gases KES
Mass Flowmeter and Counter PMS
Magnetic Inductive Flowmeter / -monitor PME
Magnetic Inductive Flowmeter/-monitor/-counter DMI
Magnetic Inductive Flowmeter/-monitor MID
Magnetic Inductive Flowmeter/-monitor PMG/PMH
Oscillation Flow Meters DOG
Ultrasonic Flowmeter DUB
Ultrasonic Flowmeter/-counter DUL
Vortex-Flowmeter,-switch DVZ
Vortex Flowmeter PWL
Universal Bussystem KOBUS
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Measuring range 1 m/s - 20 m/s air
Connection smooth shank (D = 15 mm); G1/2, Rp 1/2",
1/2 NPT, sliding flange DIN 43743
Material brass nickle plated
Max. pressure 8 bar
Max. temperature 120 °C
Switching accuracy +/-10% of meas. value.
Relays
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AALBORG®'s unique microprocessor-driven "Smart" DIGITAL MASS FLOW CONTROLLERS allow one to program, record, analyze and control flow rates of various gases with a computer via an RS 485 interface.
Programmable for various control functions such as SET POINT, TOTALIZER, STOP TOTALIZER, READ TOTALIZER, totalize from PRESET FLOW, stop at PRESET TOTAL, AUTO ZERO, PROGRAMMABLE FLOW and more. Auto zero feature utilizes an automatic balancing circuit that virtually eliminates drift of zero and span. Two dry contact closures turn external process equipment ON and OFF. Gas flow rates are unaffected by temperature and pressure variations within stated limitations.
Extensive on-board memory enables each controller to store NIST traceable calibrations for up to ten gases. Controllers also have conversion factors for 256 different gases in hardware memory making this a most versatile flow controller.
SPECIFICATIONS:
Accuracy: +/- 1% of full scale.
Repeatability: +/- .15% full scale.
Maximum Flow: 100 sL/min [N2}
Maximum Gas Pressure: 500 psig / 34.5bars.
Leak Integrity: 1 x 10- 9 sccs He maximum.
Output Signal: 4 to 20 mA 0 to 5 VDC; 0 to 10 VDC
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Digital alternative for a VA meter with totaliser and alarm functions.
MASS-VIEW(r) has an OLED display showing:
- actual flow rate (bar graph and actual value or percentage)
- desired flow units
- type of gas (7 pre-installed gases)
- totalized flow
- min. and/or max. alarm
Other features are:
- Freedom from parallax error
- Virtually independent of pressure and temperature variations
- Low pressure drop
- Wide flow ranges
- Fast response
- High accuracy
- Alarm and counter functions (2 alarm contacts available on meters)
- Analog (0..5 Vdc) and digital communication (Modbus-RTU, RS-232 interface)
- Configurable password protection
- 7 pre-installed gases available (Air, N2, O2, CO2, Ar, CH4, C3H8) or He or H2
- 4 selectable ranges (100%, 50%, 25% and 10% of maximum fullscale range)
- Digitally calibrated
- 3 year warranty
You can order these instruments online and your order is shipped within two working days.
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Sensirion’s SFC3000 is a small, fully digital mass flow controller for high-volume OEM applications. It offers fast and accurate control of gas flows over a very wide range. The digitally calibrated and temperature compensated sensor signal is converted directly into a signal which is used in the digital controlling circuit to control the valve. This results in very high accuracy, fast settling time and a large dynamic range. The mass flow controler’s excellent stability and repeatability make it ideal for analytical instruments. Different gas types and control ranges can be calibrated and switched by software.
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Our 100 Series family of mass flow controllers are one of our finest technical achievements in over 35 years in the mass flow instrumentation business. Our 100 Series is designed so the physics are correct! Our 100 Series Premium Digital family is made up of our flagship Smart-Trak® Model 100 , our highly engineered ultra-low flow solution Micro-Trak™ Model 101 and our NEMA 6 & IP67 industrial MFC, the Max-Trak™ Model 180 . Excellent accuracy and repeatability coupled with unsurpassed instrument stability result from a patented, inherently linear design, advanced platinum sensor technology, and a valve that is strong, flexible and forgiving. Our 100 Series family of instruments has raised the bar and set a higher standard in the Performance MFC marketplace.
UQNIQUE PRODUCT FEATURES
- Accuracy of +/- 1% of full scale
- Accuracy of +/- 0.7% of reading +.3% of FS
- 316 stainless steel construction
- Flow ranges from 0 to 10 sccm to 0 to 1000 slpm.
- Fast-response control valve
- True digital performance with great flexibility
- “Primary Standard” calibration& NIST traceability
- Dial-A-Gas® Technology: 10 pre-programmed gases come standard
- Small footprint makes drop-in replacement easy
- Single-sided 24 VDC power supply
- CE approval
- MAX TRAK is Industry’s only NEMA 6/IP67 industrial MFC provides wash down protection eliminating secondary enclosures
-- MICRO-TRAK Suitable for most gases with flow rates down to 0.1 sccm (smlm)
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Mass flow techniques provide more RELIABLE, REPEATABLE AND ACCURATE gas flow rate measurements compared to volumetric methods such as rotometers and turbine meters. Mass flow measurements use the density of the gas to translate mass flow units (kg or lbs) to units of familiar volumetric terms (liters/min). However the measurements are still mass units (we call those units STANDARD liter/min (slm)) and they do not change with temperature and pressure changes. We do this by referencing just one, specific temperature and one specific pressure (STP).
300 Series mass flow instruments have flow ranges from 0-5 sccm to 0-3,000 slm; use all metal seals, provide analog outputs, and are constructed of stainless steel. The mass flow controllers have normally closed valves. Corrosive gases, with the exception of the halogens, pressures up to 1000 psig (optional) are easily measured.
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The thermal mass flow meters and controllers of the smart series are especially well suited for measurement and control applications in industry and process as well as for customer-specific OEM applications. The products are provided with a multitude of features which can be easily optimized to meet a customer’s individual requirements.
- Digital and analog interface as standard
- Fieldbus-Connections: Modbus, Profibus, etc.
- Insensitive to pressure and temperature changes
- CMOS sensor technology
- Short response time for meters and controllers
- High accuracy and turndown ratio
- Minimum pressure loss
- Temperature measurement as standard (digital)
- Compact design, simple installation
- Easy to service and maintain
- Materials: Aluminium or stainless steel
- Easy to add functions
- 3-year warranty
Process Control Units PCU100 & PCU800 for the thermal Mass Flow Meters & Mass Flow Controllers 'red-y smart series' are ideally suited to power and control up to eight red-y mass flow meters and controllers.
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High- performance and high-speed digital mass flow controller equipped with Yamatake “µFlow” (Microflow) sensor, to actuate a proportioning valve with high level control technology.
MQV SERIES
The MQV realizes high speed, low differential pressure and wide range flow control.
MPC SERIES
The MPC is a compact gas mass flow controller with built-in miniature proportioning valve that can either be panel-mounted or can be mounted directly on the piping.
MPC is ideally suited for welding installations and medical appliances.
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XFM Smart Flow Meter with Optional Profibus Interface
Aalborg® is pleased to introduce the Model XFM, the latest addition to its programmable Thermal Mass Flow Meter line. This low cost "Smart" meter is designed for convenience (it can be programmed remotely), performance (unit stores calibration data for 1-10 gases and conversion factors for up to 32 gases), and accuracy (±1% of FS at calibration temperature and pressure).
The XFM's automatic sensor zero offset adjustment can be activated locally (maintenance push button) or remotely (via digital interface). Digital command technology starts, reads, or saves the current auto zero value.
Additional XFM Features:
Aluminum and stainless steel models.
Digital interface RS485, RS232 (with or without LCD displays), and optional Profibus DP (with I&M functionality).
Programmable Totalizer.
High/Low Flow Alarms
Self-Diagnostic Tests.
23 different Volumetric Flow or Engineering Units.
Internal or user-specific K-factors.
Aalborg®'s XFM Digital Thermal Mass Flow Meters are NIST traceably calibrated and individually programmed.
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AALBORG®'s Model DFM MULTI-PARAMETER DIGITAL MASS FLOW METER with Digital Signal Processing provides accurate data on three different fluid parameters: flow, pressure, and temperature.
FEATURES:
- Multi-drop capability up to 256 units (for RS-485 option).
- Stores calibration data up to 10 different gases.
- Supports 10 engineering + user defined units.
- Programmable 12 digit Totalizer indicates total gas volume.
- Flow alarm limits for high & low gas flow.
- Pressure alarm limits for high & low gas pressure with relay output.
- Temperature alarm limits for high & low gas temperature with relay output.
- 4 button keypad & large 128x64 graphical LCD with back light.
- Digital (RS-232 or RS-485) & Analog outputs operate simultaneously.
- Internal conversion factors up to 32 gases.
- Automatic 0 adjustment.
- Self- diagnostics.
INTERFACE:
Features accessed via local keypad & LCD. The digital interface operates via RS485 (RS-232 available) & provides access to internal data including: flow, temperature, pressure reading, auto zero, totalizer & alarms settings, gas table, conversion factors & engineering units selection, dynamic response compensation & linearization table adjustment.
Analog interface provides 0 to 5Vdc, 0 to 10Vdc or 4 to 20 mA outputs for flow, pressure & temperature.
LEAK INTEGRITY:
1 x 10-9 smL/min of Helium maximum to outside environment.
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Bronkhorst High-Tech developed a field bus based pc-board for their mass flow metering and control solutions featuring self-diagnostics, alarm and counter functions, digital communication and remotely adjustable control settings. The digital "multibus" Mass Flow Meter can be equipped with on-board interface board with DeviceNet, Profibus-DP, Modbus or FLOW-BUS protocol. The newest digital Mass Flow Meters of the Select Series offer Multi Gas / Multi Range functionality featuring greater flexibility for user selection of both flow ranges and gas types, maintaining high accuracy and turndown range for measurement and control. Thanks to this feature users of the Select series can rescale their instruments on site, saving time (and money) for mounting and dismounting. For the convenience of the user, Bronkhorst High-Tech has developed a free and easy-to-use software tool called "FlowTune" for changing the configuration of Select instruments.
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KOFLOC D3810
The KOFLOC Mass Flow Meter MODEL 3810DS SERIES is a low-cost mass flowmeter based on the time-tested MODEL 3810 SERIES mass flow meter, but with a new improved sensor and CPU, resulting in much improved overall performance in accuracy, repeatability and size reduction. The improvement also allows much wider measurement range from as little as 100 cc to 50 L/MIN. Despite its low-cost, the MODEL 3810DS SERIES uses bypass capillary mechanism so it does not sacrifice accuracy.
FEATURES
- Rohs compliance - Compact & Low-Cost - Free mounting position
- Easy maintenance
APPLICATIONS
- Air sampling - Analyzer component - Bioreactor
- Biotechnological process - Burn control - CCFL manufacturing
- Chamber pressure control - Chemical process - Environment monitoring
- Electronic device manufacturing - Food production - Fuel cell testing
- Fermentation process - Gas blending - Gas distribution
- Gas flow monitoring - Gas generation - Industrial furnace
- Leak testing - Pharmaceutical process - Pollution monitoring
- Process flow control - R&D - Solar power element manufacturing
- Secondary calibration reference - Semiconductor process - Sputter deposition
- Surface treatment process - Thermal flame spray - Thin film manufacturing
- Vacuum apparatus - Vapor deposition
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We help you to develop a superior product based on our leading CMOSens® Technology. Together with our customers we have implemented modules and complete devices for the following markets and applications.
In cooperation with our customers we for example developed:
- Digital mass flow controllers
- Battery powered flow meters
- Gas meters
- Flow meters with 200 slm range for medical applications
- Flow meters up to 30'000 slm
- System design with combined flow and pressure control (gaschromatography)
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The latest product line developed by Teledyne Hastings Instruments is the digital version of the high capacity flow instruments. These new digital instruments allow measurement and/or control up to 10,000 slm. The new line complements the existing lower flow Digital Metaline(R) (5 sccm to 30 slm).
The two product lines, Digital Metaline and the new high capacity digital flow instruments, offer flow meters and controllers from 5 sccm to 10,000 slm, with superior accuracy. The lower flow Digital Metaline units have all-metal seals. A 4µ-inch Ra finish is available for flow rates up to 10 slm. Multiple gas calibrations and stored gas conversion factors are key features that set these instruments apart from the analog versions.
Both the Digital Metaline and the high-capacity digital flow instruments feature flexible operation with ±12, ±15 or 24 VDC power supply and transparent operation in analog or digital modes. All digital units are available with RS232 or RS485 interface with baud rates up to 19.2 kbaud. In addition, the instruments offer convenient self-diagnostics including warnings and alarms for flow, sensor, and valve status.
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The latest product line developed by Teledyne Hastings Instruments is the digital version of the high capacity flow instruments. These new digital instruments allow measurement and/or control up to 10,000 slm. The new line complements the existing lower flow Digital Metaline(R) (5 sccm to 30 slm).
The two product lines, Digital Metaline and the new high capacity digital flow instruments, offer flow meters and controllers from 5 sccm to 10,000 slm, with superior accuracy. The lower flow Digital Metaline units have all-metal seals. A 4µ-inch Ra finish is available for flow rates up to 10 slm. Multiple gas calibrations and stored gas conversion factors are key features that set these instruments apart from the analog versions.
Both the Digital Metaline and the high-capacity digital flow instruments feature flexible operation with ±12, ±15 or 24 VDC power supply and transparent operation in analog or digital modes. All digital units are available with RS232 or RS485 interface with baud rates up to 19.2 kbaud. In addition, the instruments offer convenient self-diagnostics including warnings and alarms for flow, sensor, and valve status.
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The FMA-1600A and FVL-1600A Series mass and volumetric flowmeters use the principle of differential pressure within a laminar flow field to deterime the mass flow rate. A laminar flow element (LFD) inside the meter forces the gas into laminar (streamlined) flow. Inside this region, the Poiseuille equation dictates that the volumetric flow rate be linearly related to the pressure drop along a fixed distance of the LFE. This, along with the viscosity of the gas, is used to accurately determine the volumetric flow rate. Separate absolute temperature and pressure sensors are incorporated and correct the volumetric flow rate to a set of standard conditions. This standardised flow rate is commonly called the mass flow rate and is reported in units such as standard cubic feet per minute (SCFM) or standard litres per minute (SLM).
Standard units include a 0 to 5 V output (4 to 20 mA optional) and RS232 communications. The gas select feature can be adjusted from the front of the keypad or via RS232 communications. Volumetric flow, mass flow, or absolute pressure, and teperature can be viewed or recorded through the RS232 connection. It s also possible to multi-drop up to 26 units on the same serial connection to a distance of 38 metres. These flowmeters can be powered by the optional battery pack FMA1600-BP for use in the field.
The FVL-1600A Series comprises volumetric flowmeters only. They do not measure or correct for absolute pressure or temperature. The FMA-1600A Series is recommended if the operating pressure is above 10 psig or if there is any restriction or backpressure in the applications.
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Thermal mass flow-meters, Controllers
