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Thermal Mass Flowmeter
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 Thermal Mass Flowmeter Suppliers
Thermal Mass Flowmeter

Instrumart is a leading supplier of industrial instruments located just outside Burlington, Vermont. Instrumart is the operating name for Total Temperature Instrumentation, Inc. ("TTI"). Instrumart is a global company with local roots. We are a member of the Lake Champlain Regional Chamber of Commerce and Vermont Businesses for Social Responsibility. We were recently named to Inc. Magazine's Inc. 5000 list of the fastest-growing private companies in the United States for the second year in a row. Vermont Business Magazine has named Instrumart one of the Best Places to Work in Vermont and one of Vermont's Top 5 Wholesale Businesses.
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Thermal Mass Flowmeter
Sierra Instruments, Inc.
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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Sierra's Heavy-Industrial Thermal Mass Flow Meter Family
Brooks Instrument

Brooks offers three series of mass flow controllers / mass flow meters for applications requiring high leak integrity and/or ultra-high purity (UHP). These devices are designed with a 1.125” wide profile providing an efficient, space-saving footprint.
The GF Series is our newest addition to this product line. GF Series is a robust upgrade for standard high purity (HP) mass flow controllers, offering improved accuracy and cleanliness. Optional electrical adapters ensure drop in compatibility with older style analog flow controllers. Brooks’ new sensor technology with improved signal to noise performance and powerful control algorithms deliver enhanced measurement accuracy and reproducibility for optimal gas chemistry control. 
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mass flow meters
Bronkhorst High-Tech
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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Thermal Mass Flowmeter
Cole-Parmer UK
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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Coleparmer: Air/N2 Gas Mass Flowmeters
Aalborg Instruments & Controls, Inc.
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»
AALBORG: XFM digital mass flow meter
Vögtlin Instruments
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'
Thermal Mass Flowmeter
Mass Flow ONLINE B.V. delivers high quality flow metering and control instruments of Bronkhorst High-Tech B.V. and partners, not requiring customer specific advice or a quotation. All relevant information can be found online. Order today and we’ll ship your order within two working days. Selecting and buying online saves time and is cost-efficient.   The customer benefits for Mass Flow ONLINE are: 
*High quality products *Highly efficient purchase channel including order tracking
*Clear competitive pricing *Easy product selection and ordering
*Fast delivery *Clear return policy and safe payment
*24/7 open for business  
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Mass Flow ONLINE : ‘MASS-VIEW' MASS FLOW METERS WITH OLED DISPLAY
Featured Thermal Mass Flowmeter Products
Instrumart's Thermal Mass Flowmeter
Thermal Mass Flowmeter
GFM mass flow meter is a low cost solution to thermal mass flow metering for gases. The design of the GFM mass flow meter combines the convenience and accuracy of a conventional mass flow meter with low costs previously unattainable.
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GFC thermal mass flow controller is designed to indicate and control set flow rates of gases. The GFC mass flow controller combines the characteristics and accuracy of conventional mass flow devices into a unique compact design at low costs previously unattainable.
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AFM Series of thermal mass flow meters is designed to indicate the flow rates of gases. Each AFM Series mass flow meter incorporates an advanced straight tube sensor in conjunction with flow passage elements constructed of stainless steel. LED readouts of command modules are supplied with 0 to 100% calibrations. Zero and span adjustments are conveniently accessible from outside of the transmitters.
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Sierra: Model 780S Flat-Trak™ Inline Mass Flow Meter with Flow Conditioning
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>>

Brooks: Digital Mass Flow Meters & Controllers
Digital Mass Flow Meters & Controllers

High Performance Flow Control
The Brooks Instrument GF100 is a robust upgrade for standard high purity (HP) mass flow controllers, offering improved accuracy and cleanliness. Optional electrical adapters ensure drop in compatibility with older style analog flow controllers. Brooks’ new sensor technology with improved signal to noise performance and powerful control algorithms deliver enhanced measurement accuracy and reproducibility for optimal gas chemistry control.
The GF100 is designed for long-term reliability with embedded diagnostics and automated zeroing to reduce maintenance for a lower cost of ownership.

  • High purity construction with reduced surface area and removal of unswept volumes for faster dry-down during purge
  • Surface passivated high purity wetted flow path
  • 10 μ inch Ra surface finish
  • Independent service and diagnostic port for on-tool troubleshooting and process fingerprinting and optimization
  • Integrated high visibility LCD display reports flow (%) and temperature (°C)
  • Analog and Serial (RS-485), analog 0–5 VDC and DeviceNet™ communication interfaces
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Bronkhorst: µ-FLOW Mass Flow Meters
Bronkhorst: ?-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
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Cole-parmer: Air/N2 Gas Mass Flowmeters
Coleparmer: 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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AALBORG: XFM digital mass flow meter
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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Press Release : Bronkhorst's BRIGHT Series Compact Local Readout/Control Module
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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Vögtlin Instruments : MASS FLOW METERS 'RED-Y COMPACT SERIES'
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
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Mass Flow ONLINE : ‘MASS-VIEW' MASS FLOW METERS WITH OLED DISPLAY
Mass Flow ONLINE : ‘MASS-VIEW' MASS FLOW METERS WITH OLED DISPLAY

This Multi Gas / Multi Range instrument has the following features

  • Clear indication in:
    • actual flow rate (bar graph and value)
    • desired flow units (59 units selectable)
    • type of gas (standard 7 pre-installed)
    • totalized flow (in several units)
    • Bright, wide-angle OLED display
  • Low pressure drop
  • Wide flow ranges
  • Virtually independent of pressure and temperature variations
  • Fast response
  • High accuracy and turndown ratio
  • No moving parts in the flow channel
  • High and low alarm settings with programmable delay with 2 integrated relays
  • Batch counter function
  • Analog (0..5 Vdc) and digital communication (Modbus-RTU, RS-232 interface)
  • Configurable password protection
  • 7 pre-installed gases available or He or H2
  • 4 selectable ranges (100%, 50%, 25% and 10% of maximum fullscale range)
  • Digitally calibrated
  • Zero offset adjustment per gas
  • Installable in any position (flipscreen function available)
  • 3 years warranty
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Types of Flowmeters
» Ultrasonic
» Thermal Mass
» Mass Flow Controller (MFC)
» Coriolis Mass
» Rotameter
» Positive Displacement PD Meter
» Vortex shedding
» Multiparameter Mass Vortex
» Multiphase
» Turbine
» Gas Flowmeter
» Air Flowmeter / Anemometer
» Compressed air Flow
» Calorimetric
» Compound Meter
» Electromagnetic
» Flumes & Weirs
» Insertion Flow Meter
» Open Channel
» Orifice plate
» Paddle Meter
» Variable Area
» Venturi
» Doppler
» Transit-Time
» Portable Flow meter
» Low Flow Measurement
» Laminar Mass
» Medical
» OEM
» dP cell/transmitter