mass flow meter thermal

Thermal Mass Flowmeter

Thermal Mass Flowmeters - The rate of heat absorbed by a flow stream is directly proportional to its mass flow. As molecules of a moving gas come into contact with a heat source, they absorb heat and thereby cool the source. At increased flow rates, more molecules come into contact with the heat source, absorbing even more heat. The amount of heat dissipated from the heat source in this manner is proportional to the number of molecules of a particular gas (its mass), the thermal characteristics of the gas, and its flow characteristics.

Featured Suppliers

Brooks offers a wide range of digital and analog thermal mass flow meters and controllers with elastomer seals for use in industrial process control applications or metal seals for ultra-high purity applications. Brooks MFCs are valued the world over for their accuracy, reliability, and longevity. These devices can measure and control full-scale gas flows from 3sccm to 2500slpm with accuracy to +/- 1% of rate. Digital communications are available via RS-232/485, DeviceNet or PROFIBUS-DP® for easy integration into advanced control systems, such as Brooks's DeltaV®. They are also available with either 0-5 Vdc or 4-20 mA outputs for use with analog control systems. Models are offered with NEMA 4X enclosures suitable for hose-down.
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Delta Class Gas Mass Flow: Elastomer Seal

We designed our Heavy-Industrial Thermal mass flow meter products for the most demanding industrial gas mass flow measurement applications. Featuring heavy-duty 316 stainless steel wetted materials, no moving parts and digital signal processing, our Heavy-Industrial Thermal line is the answer for the roughest industrial environments. Our Model 640S Steel-Trak™ is an insertion probe design and our Model 780S Flat-Trak™ is an inline design featuring an integrated dual-plate flow conditioning element (Flow=Trak™) that allows the instrument to maintain top performance in heavily constrained piping environments where long-straight pipe runs simply do not exist. Our Model 780S-UHP is an inline flow conditioned design for gas distribution in ultra clean processes. All models feature DIRECT mass flow measurement and Sierra’s Smart Electronics Package for field-rangability, flow-range adjustment, and meter validation and diagnostics.
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Cole-Parmer UK gas mass flow meters and mass flow controllers can handle a wide range of gases including nitrogen, oxygen and argon. They are available in either aluminum or 316 stainless steel bodies. Cole-Parmer gas mass flow meters can measure gas flow from 0 sccm to 1000 sL/min with high accuracy models offering ?0.5% accuracy of reading. Our gas mass flow meter output options include mass flow display, totalizer display, 0 to 5 VDC or 4 to 20mA analogue signal. Order an analogue to RS-232 converter to allow data collection and analysis on your PC
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Bronkhorst High-Tech B.V., established in 1981, offers the most extensive product range of thermal mass flow meters and controllers on the market. Numerous styles of both standard and bespoke instruments can be offered for applications in laboratory, industrial and hazardous areas.
The full scale measuring range (with 50:1 turn-down) for these instruments can be selected between 0-1 mln/min and 0-10000 m3n/h for gases and 0-30 mg/h up to 0-20 kg/h for liquids.
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Aalborg Instruments & Controls, Inc.
The flow rate can be displayed in 23 different volumetric flow or mass flow engineering units including user specific. Flow meters can be programmed remotely via RS-232/RS-485 or optional Profibus DP interface.XFM flow meters support various functions including: programmable flow totalizer, high and low flow alarm, automatic zero adjustment, 2 relay outputs, jumper selectable 0-5 Vdc or 4-20 mA analog outputs, status LED diagnostic, capable to store calibration for up to 10 different gases, internal or user-specific K-factors. Optional local 2 x 16 characters LCD display* with adjustable back light provides Flow, Total and diagnostic reading simultaneously. Click Here for More»

Vögtlin Instruments AG offers high-quality devices and solutions for your flow measurement and control tasks: Reliable & precise mass flow meters & controllers for gases (Accuracy +/- 0,3% of full scale and +/- 0,5% of reading, turndown ratio 1 : 100) – Modular & customizable variable area flowmeters for liquids and gases – High precision needle valves for fine dosages. Profit from our many years of experience as developers, manufacturers and service partners.
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Vögtlin Instruments : MASS FLOW METERS 'RED-Y COMPACT SERIES'

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Featured Products

Brooks: Digital Mass Flow Meters & Controllers

Digital Mass Flow Meters & Controllers
The Brooks® line of digital thermal mass flow instruments offers faster response, better accuracy and improved control over traditional analog devices.

Industry leading repeatability ensures a stable process even under changing conditions
Self diagnostics and alarms eliminate downtime
Multiple communication protocols allow easy integration into many control systems
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
Available with traditional analog or digital I/O
Globally approved for a variety of service areas
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Sierra: Model 780S Flat-Trak™ Inline Mass Flow Meter with Flow Conditioning

316SS construction
Range of process connections
Field Validation/Configuration
2% reading accuracy
Very large installed base
Removable probe for recal/service
In-line flow conditioning
Meters all process gases

The Model 780S Flat-Trak™ offers improved measurement capabilities in installations where long straight pipe runs are not available. The meter incorporates Sierra’s unique dual-plate flow conditioning element to eliminate velocity profile distortions as well as swirl and temperature stratification in the gas stream. This product reduces piping straight run requirements to as little as three upstream diameters. As a result, you save money on installation costs when compared to an orifice-plate where at least 20 upstream piping diameters are required for optimal performance.

The Model 780S is available in pipe sizes from 1/4-inch to 8-inches in a choice of NPT, Buttweld or ANSI 150 lb. flanged design (300 lb. flanges optional). Larger sizes are available upon request. This meter features Sierra's well-known Smart Electronics Package for field-rangability, field flow-range adjustment, and field validation and diagnostics. The Model 780S has outstanding low-velocity sensitivity and exceptional accuracy.

The Model 780S is hazardous area approved for FM, CSA, EEx, PED, CE, CENELEC and is also available with a NEMA 4X (IP65) enclosure. Product accuracy is ?2% of reading, 0.2% of full scale repeatability. More>>

Cole-parmer: Air/N2 Gas Mass Flowmeters

Mount optional totalizer on top of display for simultaneous flow rate and total
All meters include a NIST-traceable certificate of calibration
Flow rates are unaffected by temperature and pressure variations within stated limitations

Flowmeters combine an advanced straight sensor tube with a restrictor flow element to provide high accuracy and repeatability.

Flowmeters include a detachable 3 digit LCD that can be tilted up to 90° for easy reading. Mount display up to three feet away from the sensor with extension cable 32662-70. Attach optional totalizer 32650-70 to display total accumulated flow. Flowmeters come with a certificate of calibration traceable to NIST standards.
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Bronkhorst: µ-FLOW Mass Flow Meters
	No moving parts Thru-Flow measurement Attitude insensitive Fast and accurate measurement Negligible dead-volume In combination with a control valve: continuous and stable control Analog or digital: RS232, Profibus-DP®, DeviceNetTM, Modbus or FLOW-BUS Stainless Steel sensor; on request: PEEKTM, Fused Silica

Press Release : Bronkhorst's BRIGHT Series Compact Local Readout/Control Module

Bronkhorst High-Tech designed a new R/C-module for Mass Flow and Pressure Meters/Controllers, to fulfil the demand for local indication of the actual flowrate and/or totalised fluid consumption. The BRIGHT Series features a modern OLED display for indication of measured/totalised value, easy push-button operation, i.e. change of setpoint, counter reset, fluid selection, etc. Mounting directly on the meter/controller or on an adjacent wall/panel or on the instrument's pipework.
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AALBORG: XFM digital mass flow meter

Supports up to 23 Engineering Units (including User Defined).
Stores calibration data for up to 10 gases.
Programmable Totalizer indicates total gas quantity.
High and low gas flow Alarm limits with preset delay interval.
Two sets of user-programmable electromechanical SPDT relays with latch option.
User-selectable analog 0-5 Vdc or 4-20mA outputs.
Internal Conversion factors for up to 32 gases.
Digital Interface (RS-232 / RS-485, Profibus DP available).
Multi-Drop Capability of up to 256 units (RS-485 option).
Optional Profibus DP interface with I&M functionality.
Automatic sensor zero offset adjustment (via digital interface or local push button).
Self-Diagnostic Tests.
Local 2 x 16 characters LCD display* with adjustable back light (optional).
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Vögtlin Instruments : MASS FLOW METERS 'RED-Y COMPACT SERIES'

First mass flow meter with battery power
At least two years of autonomy
CMOS sensor technology
On-the-spot direct reading, including bar graph
Extremely compact unit
Insensitive to pressure and temperature changes
High accuracy and turndown ratio
No moving parts
Resistant to pressure bumps
No restriction on installation position
No inlet section required
Optional 24 Vdc supply, manual valve & switch
3-year warranty