Guiyang.bai@honno-auto. com
86-13840589744
Intelligent industrial gas turbine flow meter that integrates FLOW, PRESSURE and TEMPERATURE detection in one instrument and automatically compensates for pressure, temperature and gas compressibility factors, delivering accurate volume flow readings across changing process conditions. Built on a high-precision intelligent circuit board with flow deflectors, pressure/temperature sensors and high-quality stainless-steel bearings. Very low lower-limit flow (below 0.5 m/s), low pressure loss and strong impact resistance; fully sealed construction with self-lubricating bearings and internal oil reservoir for a long working life. Ultra-low-power MCU with LCD display; instrument coefficient can be set online via buttons; non-linear accuracy compensation keeps the correction formula better than ±0.02%. Nominal sizes DN25–DN200 (DN10–DN300 on request), flow ranges 2.5–25 up to 125–2500 m³/h, working pressure 1.6/4.0 MPa standard (PN10–PN63 optional), accuracy up to ±1% FS (±1.5% FS standard class). Flange connections; cast-aluminium housing (stainless steel above 4.0 MPa), 316L sensor. Explosion-proof version Ex d IIC T2–T6; IP65. Outputs: 4–20 mA, pulse 0.1–5000 Hz, HART, RS485 and RS232; supply 24 VDC ±10% or 220 VAC. Suitable for air, natural gas, hydrogen, nitrogen, coal gas, phosgene, flue gas and other steady-state gases.
The HNF20-C is an intelligent gas turbine flow meter integrating flow, pressure and temperature detection on a high-precision intelligent circuit board with flow straightener, pressure/temperature sensors and premium stainless bearings. It automatically compensates for pressure, temperature and gas compressibility factor.
Wide measuring range, lower velocity below 0.5 m/s, low pressure loss and strong impeller impact resistance. Fully sealed isolated protection with self-lubricating bearings and an internal oil reservoir ensures reliable long-term operation. An ultra-low-power MCU with LCD display allows on-line coefficient setting via keys; non-linear accuracy compensation exceeds ±0.02%. Widely used for steady-state gas metering in natural gas, coal-to-gas, chemical, pharmaceutical, petroleum, printing & dyeing, coal mining and metallurgy industries.
Media: Natural gas / air / N₂ / H₂ / coal gas Size: DN10 – DN200 (up to DN300) Accuracy: ±1.0% FS (typical) Explosion proof: Ex d IIC T2–T6 Outputs: 4-20mA / pulse / HART / RS485
Applications: natural gas metering, coal-to-gas plants, chemical gas dosing, pharmaceutical gas lines, petroleum industry, printing & dyeing, coal mine gas & metallurgy monitoring, compressed air & nitrogen distribution, hydrogen flow measurement, flue gas monitoring, industrial energy metering.
Select this model when all of the following conditions are met:
The medium is a steady-state gas (natural gas, air, nitrogen, hydrogen, coal gas, phosgene, flue gas, etc.).
Pipe size is DN10–DN200 with flange connection and on-line P/T compensation is required.
Operating pressure is 1.6–4.0 MPa (PN10–PN63 optional) and temperature does not exceed +70 °C.
4–20 mA, pulse, HART or RS485/RS232 output is needed for SCADA or metering integration.
The site is a Zone 1/Zone 2 hazardous area requiring Ex d IIC T2–T6 flameproof certification.
Automatic P/T and compressibility compensation is desired to output standard volumetric flow without lookup tables.
Please consult us first if: the gas is dirty or highly wet, flow is pulsating or vibration is severe, pipe size exceeds DN200, pressure exceeds 4.0 MPa (stainless housing required), or custody-transfer calibration certificates are required.
One instrument measures flow, pressure and temperature and automatically compensates pressure, temperature and gas compressibility factor, directly outputting standard volumetric flow and eliminating manual lookup and conversion errors.
Lower velocity below 0.5 m/s, low pressure loss and robust impeller. DN25–DN200 covers 2.5–2500 m³/h, suiting duties from small kilns to main distribution piping.
Fully sealed isolation protection with self-lubricating stainless bearings and an internal oil reservoir gives strong EMC and vibration immunity for reliable long-term industrial operation.
Flameproof Ex d IIC T2–T6 with IP65. Outputs include 4–20 mA (short-circuit protected), 0.1–5000 Hz pulse, HART, RS485 and RS232 for direct connection to control and metering systems.
| Model | HNF20-C Intelligent Industrial Gas Turbine Flow Meter |
|---|---|
| Principle | Gas turbine; impeller speed proportional to velocity, non-contact pickup outputs pulse signal |
| Measured media | Steady-state gases: air, natural gas, hydrogen, nitrogen, coal gas, phosgene, flue gas, etc. |
| Nominal sizes | DN10 – DN200 (DN250/DN300 on request), flange connection |
| Flow range | 2.5 – 2500 m³/h (by size, see table below) |
| Accuracy | Typical ±1.0% FS, max ±1.5% FS; non-linearity BFSL ±0.75% FS; hysteresis & repeatability ±0.25% FS |
| Zero / span thermal drift | Zero typical ±0.3%FS/10K; span typical ±0.3%FS/10K |
| Response time | < 40 ms (typical) |
| Working pressure | 1.6 / 4.0 MPa standard; PN10 / PN16 / PN25 / PN40 / PN63 options |
| Sensor temperature | −20 … +70 °C (standard) |
| Ambient temperature | −20 … +65 °C; humidity ≤ 85% RH at 20 °C |
| Storage temperature | −40 … +65 °C |
| Output signals | 4–20 mA (short-circuit protected); pulse 0.1–5000 Hz; HART; RS485; RS232 |
| Power supply | DC 24 V ±10%; AC 220 V (reverse-polarity protected) |
| Housing | Cast aluminium (≤4.0 MPa); stainless steel (>4.0 MPa) |
| Sensor / body material | Sensor 316L stainless; body & flange stainless steel |
| Explosion protection | Ex d IIC T2 – T6 (flameproof) |
| Ingress protection | IP65 |
| Filter requirement | Filter fineness < 5 μm |
| EMC | EN 61000-6-3 (emission); EN 61000-6-2 (immunity) |
| Size | Flow range (m³/h) | Working pressure (MPa) |
|---|---|---|
| DN25 (1") | 2.5 – 25 | 4.0 |
| DN32 (1.25") | 4 – 40 | 4.0 |
| DN40 (1.5") | 6 – 60 | 4.0 |
| DN50 (2") | 10 – 160 | 4.0 |
| DN65 (2.5") | 13 – 250 | 1.6 |
| DN80 (3") | 20 – 400 | 1.6 |
| DN100 (4") | 32 – 640 | 1.6 |
| DN125 (5") | 40 – 800 | 1.6 |
| DN150 (6") | 80 – 1600 | 1.6 |
| DN200 (8") | 125 – 2500 | 1.6 |
Confirm 4 items before ordering:
Medium (natural gas/air/N₂/H₂), normal and maximum flow – to select size and accuracy class.
Working pressure and temperature – to determine pressure rating (PN10–PN63) and housing material.
Output signal (4–20 mA / pulse / HART / RS485 / RS232) and power supply.
Whether temperature compensation is required, Ex rating and body material (carbon steel/aluminium/stainless).
Install a gas filter of at least 5 μm upstream. Allow sufficient straight pipe (typically ≥10D upstream, ≥5D downstream), avoiding valves, elbows and strong vibration. After power-up, set the meter coefficient on-line via keys; the LCD shows instantaneous and standard flow. P/T-compensated versions compensate automatically; verify readings against secondary instruments before commissioning.
4–20 mA analogue output: short-circuit protected, transmits standard volumetric flow to SCADA, PLC or chart recorders.
Pulse/frequency output: 0.1–5000 Hz, connects to flow totalisers for cumulative and auxiliary custody metering.
HART & RS485/RS232: supports remote configuration, data reading and multi-meter networking for central gas network monitoring.
Integrated P/T compensation output: automatically compensates pressure, temperature and compressibility to directly deliver standard volumetric flow.
For OEM and gas-utility projects, please specify gas composition, size, pressure rating, output protocol and Ex requirement with your enquiry.
Used for city gas and plant natural gas metering and on process gas lines in coal-to-gas plants; P/T compensation automatically converts to standard flow, supporting custody transfer and cost accounting.
Measures nitrogen, compressed air and process gas flow on chemical and pharmaceutical lines, paired with SCADA for precise dosing and energy monitoring.
The Ex d IIC T2–T6 flameproof version suits coal mining and metallurgy hazardous areas, monitoring methane and process gas flow for production safety.
Suitable for hydrogen flow measurement and flue gas emission monitoring; the 316L stainless sensor and fully sealed construction handle corrosive duties.
Measures compressed air, nitrogen and other utility gas consumption, providing data for workshop energy accounting and energy-saving retrofit.
To confirm the correct HNF20-C configuration, please provide: medium name & composition (wet/dusty), nominal diameter, working temperature & pressure, typical and maximum flow, accuracy class (1.0/1.5% FS), output signal type, power supply, whether temperature compensation is required, Ex rating and body material. If necessary we will request additional details on filter fineness, straight pipe conditions and hazardous-area classification.
Steady-state gases: air, natural gas, hydrogen, nitrogen, coal gas, phosgene, flue gas, etc. Dirty or highly wet gas must be filtered first and confirmed with us.
Yes. The HNF20-C integrates flow, pressure and temperature detection and automatically compensates pressure, temperature and gas compressibility factor, directly outputting standard volumetric flow.
Yes. The lower velocity is below 0.5 m/s with a wide measuring range and low pressure loss, suiting low-flow gas monitoring.
Fully sealed isolation protection, self-lubricating stainless bearings and an internal oil reservoir provide long-term self-lubrication, reduced wear and strong EMC/vibration immunity for a long service life.
The flameproof version is Ex d IIC T2–T6 with IP65 protection, suitable for Zone 1/Zone 2 hazardous-area metering of natural gas, hydrogen and other gases.
HNF20-C Intelligent Gas Turbine Flow Meter Datasheet (PDF)
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Send us gas composition, pipe size, temperature/pressure, flow range, output type and Ex rating, and we will confirm whether HNF20-C is suitable and provide a selection recommendation before quotation.
Submit your application details »Contact: HongNuo
Phone: 13840589744
Tel: 86-13840589744
Email: Guiyang.bai@honno-auto. com
Add: Zhongguancun Innovation Center, No. 28 Huahai Road, Shenyang Economic and Technological Development Zone, Liaoning Province
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