Services
3Wire TMF2X | Thermal Mass Flow Meter
3Wire TMF2X Thermal Mass Flow Meter is designed for reliable gas flow monitoring in industrial environments. Using the thermal diffusion principle, TMF2X provides direct gas mass flow measurement without the need for external temperature or pressure compensation. It is suitable for compressed air, industrial gas distribution, process gas monitoring, low-flow detection, leakage monitoring and plant utility optimisation. TMF2X uses a constant temperature differential method to measure gas mass flow. Two platinum resistance temperature sensors are used. One sensor measures the actual gas temperature. The second sensor is heated and maintained at a fixed temperature difference above the gas temperature. As gas flows across the heated sensor, heat is removed from the sensor. The higher the gas velocity, the stronger the cooling effect. The meter measures the heater power required to maintain the temperature difference. Measures gas mass flow directly for accurate and stable readings without additional correction devices. The thermal mass flow principle allows convenient measurement without separate pressure and temperature compensation. Supports gas velocity measurement from 0.1 Nm/s to 100 Nm/s for low-flow and high-flow applications. Suitable for low-flow monitoring and leakage detection in compressed air and industrial gas systems. No moving mechanical parts, improving reliability and reducing maintenance requirements. Supports integration with PLC, SCADA, automation systems, data loggers and IoT gateways. Fully digital design supports stable measurement, accurate output and convenient system integration. Sensor design is resistant to vibration and suitable for demanding industrial operating environments. Designed for straightforward installation, configuration and maintenance. Online installation may be possible where site conditions permit. TMF2X supports a broad pipe size range from DN15 to DN300mm, with standard and extended flow range options depending on application requirements. Typical applications include compressed air lines, gas distribution headers, process gas systems, nitrogen, oxygen, argon, biogas and other compatible industrial gases. For correct sizing, pipe size, gas type, operating pressure, operating temperature and expected flow range should be reviewed during selection. Monitor compressed air consumption, distribution losses and abnormal air usage patterns. Measure nitrogen, oxygen, argon, biogas and other compatible industrial gases. Support low-flow detection and identification of abnormal gas losses over time. Measure gas usage for utilities, production areas and internal cost allocation. Transmit gas flow data to automation systems, data loggers, gateways and dashboards. Support compressed air efficiency studies, leakage reduction and gas consumption optimisation. Gas and compressed air systems often suffer from invisible losses. Small leaks, poor visibility and unmonitored consumption can lead to significant operating cost over time. TMF2X gives plant teams a practical way to measure gas flow continuously and accurately. When connected through RS-485 and suitable IoT gateways, TMF2X can support advanced monitoring through IoTWatt 4.0. This enables gas flow data to be combined with energy, production and equipment data for better efficiency analysis, cost tracking and sustainability reporting. The following visuals support the TMF2X thermal mass flow meter, insertion sensor configuration and product specification information above. 3Wire TMF2X Thermal Mass Flow Meter TMF2X Product Specification Visual The 3Wire TMF2X Thermal Mass Flow Meter is a reliable industrial gas flow meter designed for direct mass flow measurement, easy installation and long-term stable operation. With no moving parts, RS-485 communication, wide flow range and no need for pressure or temperature compensation, TMF2X is a practical solution for compressed air, industrial gas and process utility monitoring. Contact 3Wire / Saturn Pyro for product selection, sizing and application support.Accurate Gas Mass Flow Measurement for Industrial Applications
Insertion type thermal mass flow meter for compressed air and industrial gases.
How TMF2X Works
Key Features
Direct Mass Flow Measurement
No Pressure or Temperature Compensation
Wide Measuring Range
Low-Flow and Leak Detection
No Moving Parts
RS-485 Communication
Digital Design
Stable in Industrial Conditions
Easy Installation and Maintenance
Technical Highlights
Parameter
TMF2X Specification
Measuring Medium
Various gases, except acetylene
Connection
Insertion, flange and other options
Pipe Size
DN15 to DN300mm
Velocity Range
0.1 to 100 Nm/s
Accuracy
±1.5% RD + 0.5% FS
Temperature
Ambient: -40°C to 60°C; medium: -40°C to 150°C; higher temperature optional
Working Pressure
Insertion sensor: medium pressure up to 1.6 MPa; flanged sensor: medium pressure up to 1.6 MPa
Power Supply
24 VDC or 220 VAC
Output Signal
4–20 mA, RS-485, relay; HART optional
Response Time
0.5–1 second
Alarm Output
Relay, normally open state, 3A / 30VDC
Sensor Type
Standard insertion, hot-tapped insertion and flanged
Converter Type
Integrated and remote
Pipe Material
Carbon steel, stainless steel, plastic and others
Protection Level
IP65
Sensor Housing Material
Stainless steel 304 / 316
Display
4-line LCD showing mass flow, standard volume flow, totaliser, velocity and other values
Flow Range and Sizing
Typical Applications
Compressed Air Monitoring
Industrial Gas Monitoring
Leakage Detection
Plant Utility Metering
PLC and SCADA Integration
Energy Efficiency Projects
Why Choose 3Wire TMF2X?
Integration with IoTWatt 4.0
TMF2X Product Visuals
.png)
Product Summary