3Wire TMF2X Thermal Mass Flow Meter is designed for reliable gas mass flow measurement in industrial utility systems. It uses the thermal diffusion principle to measure gas mass flow directly, without requiring external pressure or temperature compensation.
For IoTWatt 4.0 projects, TMF2X provides the flow data needed to monitor compressed air systems, quantify leakage, calculate compressor specific power, identify abnormal usage and support digital energy audit evidence, EECA reporting and savings verification.
Compressed air and industrial gas systems are often high-cost utilities, but many sites do not have enough flow visibility. Without continuous flow measurement, leakage, wastage, abnormal demand and inefficient compressor operation can remain hidden.
TMF2X provides a practical way to monitor gas mass flow continuously. It is suitable for compressed air lines, gas distribution headers, process gas systems, nitrogen, oxygen, argon, biogas and other compatible industrial gases, except acetylene.
TMF2X is best positioned as an industrial thermal mass flow meter for compressed air monitoring, gas utility visibility, leakage detection, plant utility metering and IoTWatt 4.0 compressed air analytics.
IoTWatt 4.0 can combine compressor electrical data with TMF2X air flow data to evaluate compressed air performance, leakage behaviour and operating efficiency.
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, while 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.
The heater power required to maintain the temperature difference is directly related to gas mass flow rate, allowing TMF2X to measure gas mass flow without separate pressure or temperature compensation.
Measures gas mass flow directly for accurate and stable readings without additional correction devices.
Thermal mass flow measurement eliminates the need for 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.
4-line LCD display can show mass flow, standard volume flow, totaliser, velocity and other values.
IP65 protection level with stainless steel 304 / 316 sensor housing material.
Available in standard insertion, hot-tapped insertion and flanged sensor options.
| Parameter | TMF2X Specification |
|---|---|
| Measuring Medium | Various gases, except acetylene |
| Measurement Principle | Thermal diffusion / constant temperature differential mass flow measurement |
| 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 |
| Ambient Temperature | -40°C to +60°C |
| Medium Temperature | -40°C to +150°C, higher temperature optional |
| Working Pressure | Insertion sensor: up to 1.6 MPa; flanged sensor: 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 |
Compressed air is one of the most expensive utilities in many factories. Without flow measurement, it is difficult to separate normal demand from leakage, artificial demand, poor operating control or inefficient compressor performance.
| Monitoring Area | What TMF2X Provides | IoTWatt 4.0 Value |
|---|---|---|
| Flow Profile | Continuous compressed air or gas flow trend. | Understand consumption behaviour by hour, shift, area or process. |
| Leakage Baseline | Low-flow visibility during non-production or idle periods. | Identify leakage and abnormal standby consumption. |
| Specific Power | Flow data combined with compressor kW data. | Calculate compressor efficiency and track kW per flow output. |
| Abnormal Demand | Unexpected flow increase or unusual usage patterns. | Generate investigation tickets and operational alerts. |
| Savings Verification | Before and after flow profile comparison. | Support leakage repair savings and compressed air optimisation evidence. |
TMF2X gives IoTWatt 4.0 the air flow data needed to move from “compressor kWh only” to real compressed air efficiency analysis.
TMF2X supports a broad pipe size range from DN15 to DN300mm, with standard and extended flow range options depending on application requirements.
For correct sizing, the pipe size, gas type, operating pressure, operating temperature, minimum flow, normal flow and maximum expected flow should be reviewed during product selection.
For compressed air and gas monitoring projects, the flow meter should be selected based on real operating conditions, not only pipe size. Oversized or undersized flow meters may reduce measurement usefulness.
Monitor compressed air consumption, distribution losses and abnormal air usage patterns.
Support low-flow detection and identification of abnormal compressed air losses over time.
Measure nitrogen, oxygen, argon, biogas and other compatible industrial gases.
Measure gas usage for utilities, production areas, departments and internal cost allocation.
Transmit gas flow data to automation systems, data loggers, gateways and IoTWatt 4.0 dashboards.
Support compressed air efficiency studies, leakage reduction and gas consumption optimisation.
When connected through RS-485, 4-20mA or a suitable IoT gateway, TMF2X can support advanced compressed air and gas 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.
| IoTWatt 4.0 Use | How TMF2X Supports It |
|---|---|
| Compressed Air Dashboard | Provides real-time flow and totalised compressed air consumption visibility. |
| WattMind Compressor Analytics | Supports compressor specific power analysis when combined with compressor electrical kW data. |
| Leakage Detection | Enables low-flow and non-production flow monitoring to identify leakage baseline. |
| Digital Energy Audit | Provides evidence for compressed air energy audit findings, operating patterns and improvement measures. |
| EECA / Energy Reporting | Supports utility-level data collection for energy management reporting and savings documentation. |
| WattSave Savings Verification | Supports before / after verification for leak repairs, pressure optimisation and compressed air improvement projects. |
Use TMF2X with IoTWatt 4.0 when compressed air or gas systems must be monitored not only for consumption, but also for efficiency, leakage, abnormal demand and verified savings.
The following visuals support the TMF2X thermal mass flow meter, insertion sensor configuration and product specification information above.
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3Wire TMF2X Thermal Mass Flow Meter
TMF2X product specification visual
Saturn Pyro supports 3Wire TMF2X thermal mass flow meters for compressed air monitoring, industrial gas metering, leakage detection, compressor efficiency analytics, IoTWatt 4.0 digital energy audit projects, EECA reporting data collection and verified savings initiatives in Malaysia.
Malaysia
