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MG9950 Series
The MG9950 Thermal Mass Flowmeter operates on the principle of thermal diffusion, employing a constant temperature differential approach to deliver precise gas mass flow measurement. Its compact footprint, advanced digital architecture, straightforward installation, and high measurement fidelity make it an ideal choice for industrial gas flow monitoring.
The MG9950 Thermal Mass Flowmeter delivers true mass flow readings without the need for external temperature or pressure compensation. By measuring the heat dissipation of gas molecules directly, it outputs either mass flow rate or standard volumetric flow rate natively, eliminating the complexity and error sources associated with conventional differential pressure or vortex meters. With an extraordinary turndown ratio covering 0.5 Nm/s to 100 Nm/s, it handles everything from low-velocity leak detection to high-flow process lines within a single instrument.
Built with a solid-state sensor containing no moving parts or pressure-sensitive components, the MG9950 exhibits excellent seismic resistance and an extended service life. It remains unaffected by mechanical vibration, pipeline stress, or harsh industrial environments, ensuring consistent measurement accuracy without drift. This intrinsic robustness translates into minimal maintenance requirements and reduced total cost of ownership over the instrument lifecycle.
The MG9950 Thermal Mass Flowmeter offers multiple installation configurations — inline pipeline, online insertion, and insertion styles — with the insertion variant ideally suited for large-diameter or irregular pipelines where conventional meters cannot fit. Its all-digital circuit design ensures precise signal processing and simplified diagnostics. Standard RS-485 and HART communication interfaces enable seamless integration into plant automation and SCADA systems, while dual DC 24 V / AC 220 V power supply options accommodate diverse electrical infrastructures. Optional hot-tap installation allows maintenance without process shutdown, maximizing uptime in critical applications.
General Specifications | |
Product Description | MG9950 Thermal Mass Flowmeter |
Medium | Various gases (excluding acetylene gas) |
Housing Structure | Dual compartmen |
Housing Material | High pressure cast aluminum |
Body Material | Carbon steel or stainless steel |
Structure Mode | Insertion type, pipeline type |
Cable Entry | 1/2"NPT or M20×1.5 |
| Sensor Material | Insertion type: stainless steel Pipeline type: carbon steel or stainless steel |
Pipeline Diameter Range | |
Insertion type | DN15~4000mm |
Pipeline type | DN15~2000mm |
Electric | |
Power Supply | DC 24V or AC 220V > 25W |
Output Signal | 4-20mA (maximum load 500 Ω), pulse, RS-485, HART protocol |
Alarm | 2-channel relay normally open contacts, 3A/220V/AC, 3A/30V/DC |
Temperature | |
Fluid Temperature | -20~+100℃, -20~+200℃, -20~+350℃ |
Pressure | |
Operation Pressure | Insertion Type ≤ 2.5MPa Pipeling Type ≤ 4.0MPa |
Measurement Performance | |
Measurement Accuracy | ±1.5% |
Response Speed | 1s |
Flow Rate Range | 0.1~120 Nm/s |
Display | |
Local Display | Four line Chinese character LCD display |
| Display Content | Mass flow rate, standard condition volume flow rate, cumulative flow rate, standard time, cumulative operating time, standard flow rate, etc |
Hazardous Locations Certification | |
FM | Factory Mutial (FM) Approvals |
CEX | Explosion Proof |
CEI | Intrinsically safe |
CSA | Canadian Standards Association |
IEI | International Education Consortium |
GR | GOST Certification |
Machinery | |
Sensor Sealing | Graphite gasket, others |
Mounting Mode | Remote mounted type, integration type |
Structure Mode | Insertion type DN15~4000 Flange type DN15~2000 |
Flange | Carbon steel, Stainless steel（304、316），RF,RJ,MFM |
| Sealing | Factory sealing |
Ingress Protection | IP65 |
In refineries and natural gas processing facilities, the MG9950 Thermal Mass Flowmeter accurately measures mass flow of methane, hydrogen, and process gases across pipeline networks. Its wide turndown ratio captures both high-velocity mainline flow and low-velocity leak detection points, while the insertion design simplifies retrofitting into existing large-diameter pipes without line shutdown.
For thermal power plants and boiler systems, the MG9950 monitors combustion air, flue gas, and auxiliary gas flows in real time. Because it requires no temperature or pressure compensation, the transmitter delivers direct mass flow data that optimizes fuel-to-air ratios, improves combustion efficiency, and reduces emissions across varying seasonal and load conditions.
In steel mills and metal processing plants, the MG9950 tracks consumption of oxygen, nitrogen, and compressed air supplied to converters, blast furnaces, and heat-treatment stations. The sensor's solid-state construction withstands heavy vibration and thermal cycling inherent in metallurgical environments, ensuring uninterrupted measurement accuracy.
At wastewater treatment plants and landfill gas recovery sites, the MG9950 measures aeration air and biogas flow with high precision. Its ability to detect velocities as low as 0.5 Nm/s makes it ideal for identifying leaks in collection systems, while the corrosion-resistant stainless-steel construction ensures longevity in aggressive gas environments.
The MG9950 operates on the principle of thermal diffusion using a constant temperature difference method. By directly measuring the heat dissipation of gas molecules, it natively outputs true mass flow rate or standard volumetric flow rate without external temperature or pressure compensation. This simplifies system configuration, reduces installation complexity, and eliminates the error sources associated with conventional derived-mass calculations.
The MG9950 offers an exceptional turndown ratio, accurately measuring gas flow velocities from as low as 0.5 Nm/s up to 100 Nm/s within a single instrument. This extraordinary rangeability makes it equally suitable for high-flow process pipelines and low-velocity gas leak detection applications.
Yes. The MG9950 supports pipeline type, online insertion type, and insertion type configurations. The insertion style is specifically designed for large-diameter or irregular pipelines where conventional inline meters cannot be accommodated. With special customization, non-stop installation and maintenance can be achieved when on-site conditions permit, maximizing process uptime.
Yes. The MG9950 features a solid-state sensor with no moving parts or pressure-sensitive components, delivering excellent seismic resistance and immunity to mechanical vibration. It is available with explosion-proof and intrinsically safe hazardous location certifications, and its enclosure meets IP65 ingress protection standards, ensuring reliable operation in demanding industrial conditions.
Looking for a gas flow measurement solution that eliminates the need for temperature and pressure compensation? The MG9950 Series Thermal Mass Flowmeter delivers true direct mass flow readings, exceptional rangeability from 0.5 to 100 Nm/s, and rugged solid-state performance for your most demanding industrial applications. Contact our technical specialists today for model selection guidance and a customized quotation. Click the "Inquire" button to explore detailed specifications, or add the unit to your basket for immediate delivery!
