Mass Flow Meters and Controllers
Mass Flow Measurement and Control for Clean Gases
Able Instruments supply mass flow meters and controllers for clean-gas measurement and regulation. Dwyer GFM covers measurement-only duties, while Dwyer GFC adds an integral valve and PID electronics for automatic closed-loop control to a setpoint.
The category also includes Dwyer GFT2 secondary display and totalisation equipment and OMEGA FLR1600/FLV4600 volumetric low-flow instruments for pure, clean DI or distilled water. GFT2 works from a compatible external analogue instrument, while the OMEGA water family measures volumetric rather than mass flow.
Quick Select by Requirement
- Clean-gas measurement only: Dwyer GFM Gas Mass Flow Meters
- Clean-gas closed-loop control: Dwyer GFC Gas Mass Flow Controllers
- Pure, clean DI or distilled-water measurement: OMEGA FLR1600 meter configurations
- Pure, clean DI or distilled-water closed-loop control: OMEGA FLV4600 controller configurations
- Display and totalisation from a compatible analogue instrument: Dwyer GFT2 Flow Totalizers
Why Choose Mass Flow Meters and Controllers?
Thermal mass flow meters provide a direct clean-gas flow measurement and an electrical signal for monitoring, recording or wider system integration. They suit duties where the required gas, calibration basis, operating conditions and full-scale range can be defined at selection.
A mass flow controller adds automatic regulation. It compares measured flow with a local or remote setpoint and adjusts an integral valve, allowing the process to maintain the selected flow without a separate control valve and control loop.
When Mass Flow Meters and Controllers Are a Strong Fit
These families suit clean-gas measurement and control in laboratory, analytical, OEM test, gas-blending and process systems. The OMEGA route is deliberately narrower, supporting volumetric low-flow measurement or control only for pure, clean DI or distilled water. GFT2 is relevant where a compatible analogue meter or controller needs a separate local display, flow totalisation, alarms or serial integration.
Key Considerations Before Specifying
Start with the medium and the required function, then confirm the operating and integration details for the selected family.
- Measurement or control: Decide whether the application only needs a measured output or must automatically regulate flow to a setpoint.
- Medium and calibration: Identify the clean gas and calibration basis. For FLR1600/FLV4600, confirm pure, clean DI or distilled water only.
- Flow range: Define minimum, normal and maximum flow so the selected full-scale range provides useful measurement or control resolution.
- Materials and pressure: Check wetted materials, seals, connections, operating pressure, pressure drop and temperature against the selected medium and configuration.
- Signals and power: Confirm analogue input and output requirements, setpoint source, communications, electrical supply and connector arrangement.
- Display and totalisation: Establish whether local indication, accumulated total, alarms or serial integration are required in addition to the primary measurement or control function.
Dwyer and OMEGA Flow Selection
The Dwyer range separates clean-gas measurement through Series GFM from closed-loop clean-gas control through Series GFC. Series GFT2 supports compatible analogue meters and controllers as a secondary display and totalisation device. The OMEGA FLR1600/FLV4600 family provides a separate choice between volumetric measurement and closed-loop control for qualifying low-flow water service.
Able Instruments are an official UK and Ireland channel partner for DwyerOmega. Able can help define the required function, medium, flow range, material configuration, pressure conditions and electrical interface before quotation.
Mass Flow Meter and Controller Support
Able Instruments can help match the measuring, controlling or totalisation function to the medium, operating range and wider system requirements.
- Application qualification: Clarifying the medium, measurement objective, operating conditions and required level of automatic control.
- Meter or controller selection: Guidance choosing measurement-only, closed-loop control or secondary display and totalisation.
- Configuration compatibility: Support checking flow range, calibration, materials, valve arrangement, pressure conditions, signals and power.
- Integration and documentation: Help confirming connections, communications, mounting and the technical information needed for specification.
Mass Flow Meters and Controllers – Frequently Asked Questions
What is the difference between a mass flow meter and a mass flow controller?
A mass flow meter (MFM) measures flow and provides an indication or output signal. A mass flow controller (MFC) also compares the measured flow with a setpoint and adjusts an integral valve to regulate flow automatically. Dwyer GFM is measurement-only, while Dwyer GFC provides closed-loop control.
Are all products in this category gas mass-flow instruments?
No. Dwyer GFM and GFC are clean-gas mass-flow instruments. OMEGA FLR1600 and FLV4600 measure volumetric low flow for pure, clean DI or distilled water, while Dwyer GFT2 is a secondary display and totaliser for a compatible external instrument.
What does a flow totaliser do?
A flow totaliser receives a signal from a compatible flow meter or controller and displays values such as instantaneous flow, total and accumulated total. The Dwyer GFT2 does not contain the primary flow sensor, so the connected instrument and signal must be selected and configured correctly.
How do I choose the correct flow range?
Define the minimum, normal and maximum required flow, the medium and calibration basis, then select a model whose full-scale range provides useful resolution across the normal operating band. Pressure conditions, materials, connections, valve requirements and signal configuration must also be checked.
Does this category include Coriolis mass flow meters?
No. This category covers the Dwyer thermal clean-gas families, a compatible secondary totaliser and the specialist OMEGA low-flow water family. Use Able’s separate Coriolis Mass Flow Meters category where Coriolis measurement is required.
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