Hongnuo (shenyang) General Machinery Co., Ltd. is one of the most reliable manufacturers and suppliers of digital vortex flow meter in China. Welcome to buy high quality digital vortex flow meter at competitive price from our factory. We also accept customized orders.
The HNF40-B Intelligent Industrial Vortex Flow Meter is a high-performance flow measurement solution for steam, gas, and liquid applications. Utilizing the proven Kármán vortex street principle, it delivers reliable and accurate data with excellent long-term stability, thanks to its design featuring no moving mechanical parts.
This versatile flowmeter offers exceptional measurement capabilities, handling medium temperatures up to +350°C and pressures up to 45 MPa (on request). It provides high accuracy (±0.5% to ±1.5% for liquids and gases) and a wide turndown ratio (typically 8:1 to 20:1, extendable to ≥30:1). A key feature is the ability to separate the sensor and amplifier by up to 15 meters, offering unparalleled installation flexibility in complex industrial layouts.
The HNF40-B supports a comprehensive range of output and communication options, including 4-20mA analog, pulse/frequency, HART protocol, and RS485 with Modbus RTU, ensuring seamless integration into modern control and SCADA systems. It is available in full-bore (DN15 to DN300), insertion (DN200 to DN1500), and clamp-on designs, with wetted parts typically constructed from durable 304 stainless steel (316L optional).
Ideal for measuring saturated steam, superheated steam, compressed air, and various process liquids, it is widely used in power generation, chemical processing, heating systems, and industrial plant utility monitoring. With options for intrinsic safety (Ex ia) and explosion-proof (Ex d) certifications, IP65/IP68 protection, and robust construction, the HNF40-B combines intelligent features, measurement versatility, and industrial ruggedness for demanding flow measurement challenges.
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HNF40-A Vortex Flowmeter Parameters |
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Specific Parameters |
Value / Description |
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Measurement Principle |
The intelligent industrial vortex flowmeter works based on the principle of the Karman vortex street. When the fluid flows through the vortex-generating body with a triangular pillar in the pipeline, a regular vortex row (i.e., the Karman vortex street) is alternately generated on both sides downstream. The frequency of vortex separation is directly proportional to the flow rate of the fluid. The sensor detects this frequency signal through built-in piezoelectric elements, and after processing by the internal microprocessor and intelligent converter, it can accurately calculate the instantaneous and cumulative flow rate of the fluid, and output a standard signal. |
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Nominal Diameter Range |
Standard: Full-bore type DN15~DN400 |
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Wetted Parts Material |
304 Stainless Steel |
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Connection Method |
Clamp type |
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Maximum Measurement Error |
Liquid: ±0.5% ±1.0% ±1.5% |
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Measurement Range |
Liquid: 0.2-690000 m³/h |
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Maximum Process Pressure |
Standard pressure grade ≤2.5MPa~4.0MPa |
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Medium Temperature Range |
Standard range: -40～+250℃～350℃ |
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Ambient Temperature Range |
Non-explosion-proof location -40~+55℃ |
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Transmitter Housing Material |
Aluminum alloy shell |
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Display/Operation |
Instantaneous flow, cumulative flow, flow unit, flow percentage, etc. |
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Inputs |
0 |
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Outputs |
Frequency/pulse output: 2~3000Hz, low level ≤1V, high level ≥5V |
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Power Supply |
Pulse: 12VDC~+24VDC |
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Certificate |
0 |
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Functional Safety |
Ex ia IIC T1~T4 Ga |
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