Hongnuo (shenyang) General Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of thermal air flow sensor in China. Welcome to buy high quality thermal air flow sensor at competitive price from our factory. We also accept customized orders.

The HNF80-A Thermal Micro Gas Mass Flow Meter delivers precise and direct mass flow measurement for gases, utilizing the reliable thermal conduction (constant temperature differential) principle. Designed for compactness and high digital accuracy, it eliminates the need for separate pressure or temperature compensation, providing immediate and stable readings across its operating range.

This intelligent flowmeter offers exceptional versatility with a multi-screen LCD display that shows instantaneous flow, cumulative total, peak/valley values, and unit status. It supports a wide array of configurable outputs: dual switch outputs (PNP/NPN, selectable as NO/NC) with adjustable hysteresis, delay, and modes (hysteresis, upper/lower limit, batch, pulse); and analog outputs (1-5V, 0-10V, or 4-20mA) for seamless PLC integration. Its built-in safety lock prevents accidental setting changes, ensuring process integrity.

Engineered for demanding applications, the HNF80-A features an IP65-rated housing, constructed with fluid-contact parts in SUS304, PPS, aluminum alloy, and EPDM. It operates accurately within a fluid temperature range of 0–50°C, with a pressure resistance up to 1.2 MPa and low pressure loss. The unit allows for a rotatable display head (up to 225°) and flexible piping connections (Rc, NPT, G threads), facilitating easy installation in confined spaces.

Ideal for semiconductor fabrication (purge gas management), automotive paint shops, pneumatic system monitoring, food packaging, burner control, and laboratory equipment, the HNF80-A combines high repeatability (±1% F.S.), digital configurability, robust construction, and user-friendly operation. For reliable, direct gas mass flow measurement in critical processes, the HNF80-A sets the standard for precision and adaptability.

HNF80-A Thermal Gas Mass Flow Meter
Specific Parameters	Value / Description
Measurement Principle	Based on the principle of thermal conduction (constant temperature difference method) for gas mass flow measurement. The sensor is equipped with a heated NTC thermistor and a reference temperature sensor. When the gas flows by, it carries away the heat of the heating element, causing a change in its resistance value, which is related to the gas flow rate (mass flow). By measuring the change in resistance and using the built-in temperature sensor for real-time temperature compensation, the mass flow of the gas can be directly and accurately measured without the need for additional pressure or temperature compensation equipment.
Nominal Diameter Range	Threaded connection: Rc1/2, NPT1/2, G1/2; Rc3/4, NPT3/4, G3/4
Wetted Parts Material	Main material in contact with the fluid: SUS304, PPS, aluminum alloy, EPDM, Si, Au, FR4
Connection Method	Threaded connection
Maximum Measurement Error	Display accuracy: ±3% F.S.; Analog output accuracy: ±3% F.S.; Repeatability: ±1% F.S.
Measurement Range	Model HNF80-A-501: 5-500 L/min; HNF80-A-102: 10-1000 L/min; HNF80-A-202: 20-2000 L/min
Maximum Process Pressure	Rated pressure range: 0~0.8 MPa; Pressure resistance: 1.2 MPa
Medium Temperature Range	0~50 ℃
Ambient Temperature Range	Operating temperature: 0~50 ℃; Storage temperature: -10~60 ℃
Transmitter Housing Material	Aluminum alloy, etc.
Display/Operation	3-screen LCD display (main screen, sub-screen), can display instantaneous flow rate, cumulative flow rate, set value, etc.
Inputs	Digital Input
Outputs	Switch output (PNP/NPN selectable, multiple modes), analog output (1-5V/0-10V/4-20mA) Customizable RS485
Power Supply	DC12~24V±10%
Certificate	CE Certification (EMC Directive, RoHS Directive); Protection Grade: IP65
Functional Safety	0

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Thermal Air Flow Sensor