Thermal Mass Flow Meter
Direct Mass Flow Measurement for Industrial Gas Applications
In industrial gas measurement, inaccurate compensation, pressure fluctuation, and density correction often lead to unreliable flow data. The Instrava Thermal Mass Flow Meter eliminates these variables by directly measuring mass flow based on thermal dispersion principle, without the need for temperature or pressure compensation.
Designed for industrial gas systems, it delivers high accuracy, stable performance, and long-term reliability in compressed air, natural gas, nitrogen, oxygen, biogas, and mixed gas applications.
Why Choose Instrava Thermal Mass Flow Meter?
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Direct Mass Flow Measurement – No external temperature or pressure compensation required
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High Accuracy – Up to ±0.1% measurement accuracy
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Wide Temperature Range – Sensor up to 300°C
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Digital Output & Communication – 4–20mA, Pulse, Frequency, HART, MODBUS
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Explosion-Proof Available – Ex db IIC T6 Gb
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Compact & Easy Installation – Integrated or remote type
For plant engineers and system integrators, this means reduced installation complexity and stable long-term performance.
Flow Meter Description
Thermal Flow Meter Key Advantages
Direct Mass Flow Measurement
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No pressure or temperature compensation required
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Measures true mass flow rather than volumetric flow
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Also provides standard volumetric flow output
High Measurement Accuracy
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Accuracy up to 0.1% / 0.15%
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Excellent repeatability and stability
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Suitable for both single gases and mixed gases
Wide Process Adaptability
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Sensor temperature range: -40°C to 300°C
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Pressure rating: ≤ 1.6 MPa
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Pipe size range: DN15 – DN150
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316L stainless steel construction
Flexible Output & Communication
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4–20 mA analog output
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Pulse and frequency output
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HART communication
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MODBUS RS-485
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Supports PLC, DCS, and SCADA systems
Industrial-Grade Design
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Integrated or remote transmitter options
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LCD display with local keypad operation
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IP65 / IP67 protection rating
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Explosion-proof certification: Ex db IIC T6 Gb
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Power supply: 220 VAC or 24 VDC
Thermal Mass Flowmeter Measurement Principle – Constant Temperature Difference Method
The thermal mass flow meter operates based on the thermal diffusion principle using two platinum RTD sensors:
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One sensor continuously measures medium temperature (T1)
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The second sensor is heated above medium temperature (T2)
When gas flows across the heated sensor, heat is carried away. To maintain a constant temperature difference (ΔT = T2 – T1), the system increases heating power.
The required power is directly proportional to the mass flow rate of the gas.
This constant temperature differential method ensures:
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Direct mass flow measurement
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High repeatability
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Stable performance in fluctuating process conditions
Flow Meter Parameter
Thermal Mass Flow Meter Technical Specifications
| Parameter | Specification |
|---|---|
| Structure | Integrated / Remote |
| Applicable Gas | Single Gas / Mixed Gas |
| Pipe Diameter | DN15 – DN150 |
| Process Pressure | ≤ 1.6 MPa |
| Process Connection | Flange (Thread optional ≤ DN50) |
| Sensor Temperature | -40°C ~ 300°C |
| Transmitter Temperature | -20°C ~ 60°C |
| Material | 316L |
| Protection Grade | IP65 / IP67 |
| Display | LCD with keypad operation |
| Measurement Functions | Mass Flow, Standard Volume Flow, Totalizer |
| Output | 4–20mA, Pulse, Frequency |
| Communication | HART / MODBUS RS-485 |
| Accuracy | ±0.1% / ±0.15% |
| Power Supply | 220VAC / 24VDC |
| Explosion Proof | Ex db IIC T6 Gb |
Instrava OEM/ODM
Tailored Sourcing & Customization: Getting You the Exact Product You Need
As your trusted supplier and sourcing partner, we bridge the gap between your custom requirements and China’s vast manufacturing capabilities.
Finding the right product in a massive supply chain can be challenging. That is where we step in.
As a curated industrial supplier, our core value is simple: we stand in your shoes to help you procure the most optimal products. Whether you are an EPC contractor needing specialized technical compliance, an OEM equipment manufacturer looking for custom branding, or an industrial distributor/trader seeking competitive edge, we customize and tailor products to fit your exact procurement needs.
How We Customize to Fit Your Procurement Needs
For EPC Contractors & Engineers: We custom-configure instruments and devices to match your precise datasheets—tailoring process connections, exotic materials, signal protocols, and managing third-party calibration and testing so you get project-ready solutions.
For OEM Equipment Manufacturers: We provide comprehensive OEM/ODM customization, including custom housing, labeling, branding (private labeling), and tailored technical specifications to seamlessly integrate with your machinery.
For Industrial Distributors & Traders: We offer flexible customization in packaging, product ranges, and technical parameters, helping you differentiate your portfolio and win more local bids.
Why Partner with Us for Custom Sourcing?
One-Stop Engineering Alignment: You don’t have to deal with multiple factories. We translate your technical requirements into precise manufacturer blueprints.
Strict Quality & Compliance Safeguard: We oversee the entire customization and production process in China, ensuring the final customized product meets your local standards and certifications.
Our Ultimate Value: We don’t just sell what’s on the shelf. We find, customize, and deliver the most suitable and cost-effective product for your unique application.
Related Product Recommendations
What is the advantage of a thermal mass flow meter compared to volumetric flow meters?
Thermal mass flow meters directly measure mass flow using the constant temperature difference method. Unlike volumetric flow meters, they do not require pressure or temperature compensation, reducing system complexity and improving accuracy in gas applications.
What gases can be measured with a thermal mass flow meter?
They are suitable for compressed air, nitrogen, oxygen, natural gas, biogas, and many industrial mixed gases. Proper calibration ensures optimal performance for specific gas compositions.
Is a thermal mass flow meter suitable for high-temperature applications?
Yes. The sensor can operate up to 300°C, making it suitable for industrial furnace gas, process exhaust, and high-temperature gas monitoring applications.
Does the thermal mass flow meter support industrial communication protocols?
Yes. It supports 4–20mA, pulse, frequency outputs, and digital communication via HART or MODBUS RS-485 for integration into PLC, DCS, and SCADA systems.
Can it be installed in hazardous areas?
Explosion-proof models with Ex db IIC T6 Gb certification are available for use in hazardous industrial environments.
How do I select the correct thermal mass flow meter for my application?
Key factors include gas type, pipe diameter, operating temperature, pressure, and required communication protocol. Instrava provides engineering support for proper sizing and configuration.
Why Trust Instrava?
We select manufacturers from a neutral, impartial standpoint, always with your best interests in mind.
Our very existence depends on helping you source the products that are the perfect fit for your needs.
Based in China, we are able to conduct on-site inspections of production environments and product quality firsthand.
We help you avoid intermediaries posing as factories.
We facilitate smoother after-sales support, eliminating time zone issues and the delays often associated with dealing directly with factories.
Our multilingual team ensures effective communication.
For a trading startup, every interaction with a client is a precious opportunity—a sign that you are willing to place your trust in us and give us the chance to prove ourselves.
In the digital age, while information is easily accessible, misconceptions often cloud the trust between people.
Instrava relies entirely on trust; it is our core philosophy and the foundation of our existence in society. It is the fundamental basis for our long-term growth and our commitment to serving the community.
Please place your trust in us.
