TMF Thermal Gas Flowmeter

Operating Principle

The Thermal Gas Flowmeter measures the mass flow rate of gas directly, without requiring pressure or temperature compensation. Its principle is based on the fact that the rate at which a fluid absorbs heat is directly related to its mass flow. Gas molecules in motion collide with the thermal resistor, absorbing and carrying away heat. The greater the flow, the more molecules contact the thermal resistor and the more heat is absorbed. The amount of heat absorbed depends on the number of molecules of a given gas, as well as its thermal and flow properties.

Product Application

● Blower pipelines, ozone pipelines, and other gas lines in wastewater treatment plants.

Key words:

Categorized by application

Classification:

产品描述
Product Features
Performance Index
Field Application

- Direct measurement of gas mass flow without the need for pressure or temperature compensation.
- Suitable for both low and high flow rates, particularly ideal for large-diameter pipes.
- Equipped with a shut-off ball valve for easy calibration and maintenance.
- On-site operation with automatic system data storage during power loss and preset fault feedback.
- Insertion-type design for simple installation, requiring only an M20×1.5 hole in the pipeline.

Parameters	Details
Nominal Diameter (DN)	DN15 ~ DN3000
Measurement Range	Flow velocity 0.5 ~ 20 m/s (standard conditions: 20℃, 101.3 kPa)
Accuracy	±1% of reading or ±0.5% FS
Repeatability	±0.2%
Stability	±0.1%
Response Time	1 s
Digital Communication	RS485, Modbus RTU protocol
Analog Output	Isolated 4–20 mA
Power Supply	AC: 220 VAC ±10%, 50 Hz DC: 24 VDC ±10%
Electrical Connection	M20×1.5
Process Connection	G3/4 external thread
Straight Pipe Requirements	Upstream 10D, downstream 5D
Protection Rating	Transmitter: IP65 Sensor: IP68

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Tengine Innovation (Beijing) Instruments Inc.

Email: contact@tengine.com.cn

WhatsApp: +86 133 3109 8301

Address: Floor 6, Building 8, Yard 1,

Nongda South Road, Haidian District, Beijing