Guiyang.bai@honno-auto. com
86-13840589744
Compact inline turbine flow meter that measures BOTH flow and media temperature in one device, giving real-time, uninterrupted monitoring of liquid flow and temperature inside the pipe. The precision turbine rotates with the liquid stream and a non-contact pickup converts rotation into a measurable signal (velocity-type measurement for clean, low-viscosity single-phase liquids). Self-luminous OLED display shows current flow or temperature and can be rotated for best readability; three panel keys set the flow alarm point and temperature alarm point directly on site. Outputs OUT1–OUT3 are user-configurable: flow alarm (PNP/NPN), temperature alarm, 4–20 mA flow or 4–20 mA temperature, plus pulse output. Body in 304 stainless steel with internal threads G1/4″–G1″ (DN4–DN25), flow range 0.04–10 m³/h, pressure rating 2.5 MPa, accuracy classes 0.5 / 1.0 / 2.0. Scaling- and corrosion-resistant hardened impeller with ruby bearings for long life; fully potted electronics for reliable performance in humid industrial areas. CE approved, functional safety per IEC 61508 / IEC 61511.
The HNF20-A is a compact inline turbine flow meter that measures BOTH liquid flow and media temperature in one instrument, providing uninterrupted real-time monitoring inside the pipe.
Fluid kinetic energy drives the turbine; a non-contact pickup converts rotation into a measurable signal (velocity-type measurement for clean, low-viscosity single-phase liquids). A self-luminous OLED shows the current flow or temperature and can be rotated for best readability. Three panel keys set the flow alarm point and temperature alarm point on site. OUT1–OUT3 are user-configurable as flow alarm (NPN/PNP), temperature alarm, 4–20 mA flow or 4–20 mA temperature, plus a pulse output.
Size: DN4 – DN25 Flow: 0.04 – 10 m³/h Accuracy: 0.5 / 1.0 / 2.0 class Temperature: 0 – 100 °C Outputs: 4-20mA / pulse / dual alarm
Applications: petrochemical, electric power & energy, metallurgy & steel plants, papermaking, food production, water treatment, battery manufacturing, semiconductor cooling, machine tool cooling & lubrication, fine chemical, pharmaceutical fluid monitoring, liquid dosing & batching, low-flow water monitoring, process parameter acquisition.
Select this model when all of the following conditions are met:
The medium is a clean, low-viscosity single-phase liquid (water, oils and similar) without heavy solids.
Pipe size is DN4–DN25 with G1/4" – G1" female thread connection.
Flow and temperature must be monitored in one instrument to save tap points and space.
Local OLED indication is needed, with a display that can be rotated to suit mounting orientation.
Two alarm contacts (flow/temperature), 4–20 mA and pulse outputs are required for PLC / control integration.
The site is humid or dusty and fully potted electronics are needed for long-term reliability.
Please consult us first if: the medium carries many hard solids or fibres, high-viscosity liquids need wet calibration, medium temperature exceeds 100 °C, pressure exceeds 2.5 MPa, gas or steam measurement is needed, or flange / hygienic clamp connections are required.
One meter outputs both flow and temperature, and dual alarm contacts directly deliver over-limit protection for both variables – no separate temperature sensor required.
A 128×64 self-luminous OLED clearly shows flow or temperature; three panel keys set flow and temperature alarm points on site. The display rotates for the best viewing angle in any mounting orientation.
OUT1–OUT3 are user-assignable to flow alarm (NPN/PNP), temperature alarm, 4–20 mA flow or 4–20 mA temperature; a pulse output is also provided for easy PLC and data acquisition integration.
Hardened tungsten-alloy impeller resists scaling and corrosion; ruby bearings offer high hardness and wear resistance. Fully potted electronics suit humid industrial areas; 304 stainless body and parallel-mount capability save pipe space.
| Model | HNF20-A Turbine Flow Meter with Temperature & OLED |
|---|---|
| Principle | Liquid turbine (velocity type); fluid drives the turbine, non-contact pickup senses rotation |
| Measured media | Clean, low-viscosity single-phase liquids (water, oils and similar) |
| Nominal sizes | DN4 – DN25 (G1/4", G3/8", G3/4", G1" female thread) |
| Liquid flow range | 0.04 – 10 m³/h (by size, see table below) |
| Accuracy class | Class 0.5 / 1.0 / 2.0 |
| Temperature range | 0 – 100 °C (customisable) |
| Max. process pressure | 2.5 MPa |
| Medium temperature | 0 … +100 °C |
| Ambient temperature | −20 … +85 °C |
| Wetted / body material | 304 stainless steel (other materials by agreement) |
| Impeller & bearing | Tungsten-alloy impeller (scale/corrosion resistant); ruby bearing (high hardness, wear resistant) |
| Transmitter housing | ABS, fully potted electronics, display rotatable 360° |
| Display & operation | OLED 128×64 self-luminous; three panel keys set flow/temperature alarm points |
| Output signals | OUT1–OUT3 user-configurable: flow alarm (NPN/PNP), temperature alarm, 4–20 mA flow, 4–20 mA temperature; plus pulse output |
| Power supply | 24 VDC |
| Approvals & standards | CE; functional safety per IEC 61508 for IEC 61511 safety applications |
| Size | Normal range (m³/h) | Extended range (m³/h) | Connection / pressure |
|---|---|---|---|
| DN4 | 0.04 – 0.25 | 0.04 – 0.4 | G1/4" thread / 2.5 MPa |
| DN6 | 0.1 – 0.6 | 0.06 – 0.6 | G1/4" thread / 2.5 MPa |
| DN10 | 0.2 – 1.2 | 0.15 – 1.5 | G1/4" thread / 2.5 MPa |
| DN15 | 0.6 – 6 | 0.4 – 8 | G1/2" thread / 2.5 MPa |
| DN20 | 0.8 – 8 | 0.45 – 9 | G3/4" thread / 2.5 MPa |
| DN25 | 1 – 10 | 0.5 – 10 | G1" thread / 2.5 MPa |
Confirm 4 items before ordering:
Normal and maximum flow – to select DN4–DN25 size and accuracy class.
Pipe thread (G1/4" – G1"), medium temperature and pressure.
OUT1–OUT3 output configuration (alarm type, NPN/PNP, 4–20 mA flow or temperature).
Whether the display version is required, accuracy class (0.5/1.0/2.0) and wetted material.
Align the flow arrow and keep short straight pipe runs upstream/downstream. Rotate the OLED to the best viewing angle. Use the three panel keys to set flow and temperature alarm points, wire OUT1–OUT3 to the required PLC signals per the wiring table, then verify the OLED reading and both alarm switching directions before automatic operation.
OUT1 / OUT2 alarm contacts (NPN/PNP): independently configurable as flow or temperature alarms for over-limit interlock, warning lights and equipment protection.
OUT3 4–20 mA analogue: switchable to flow 4–20 mA or temperature 4–20 mA for PLC analogue modules or recorders.
Pulse output: frequency signal proportional to flow for PLC high-speed counters or totalisers, for cumulative metering and batching.
OLED local display: self-luminous OLED shows flow or temperature in real time, eliminating a separate indicator.
For OEM equipment projects, please specify size, medium, output configuration and accuracy class with your enquiry.
Monitors small-flow liquid on semiconductor equipment and machine tool cooling/lubrication circuits; flow and temperature are watched together, alarming immediately to protect precision equipment.
Installed on clean process liquid lines in fine chemical and pharmaceutical production for small-bore high-accuracy flow and temperature acquisition.
Used for clean liquid monitoring in food production, water treatment and battery manufacturing; 304 stainless wetted parts suit standard hygienic requirements.
Serves as an in-line monitoring element for auxiliary cooling water, lubricating oil and process liquids in petrochemical, power, metallurgy & steel and papermaking industries.
Pairs pulse output and alarm contacts for small-flow liquid batching, batch control and low-flow water monitoring on automated production lines.
To confirm the correct HNF20-A configuration, please provide: normal and maximum flow, pipe thread (G1/4" – G1"), medium name & temperature, operating pressure, accuracy class (0.5/1.0/2.0), three-output configuration (alarm type, NPN/PNP, 4–20 mA flow or temperature), OLED display requirement, and wetted material preference. If necessary we will request additional details on mounting orientation and ambient conditions.
Yes. The HNF20-A measures liquid flow and media temperature (0–100 °C) in one instrument, outputting both variables via OLED and dual alarm contacts.
DN4/DN6/DN10 use G1/4", DN15 uses G1/2", DN20 uses G3/4" and DN25 uses G1" female thread, covering small-bore threaded piping from DN4 to DN25.
Yes. The self-luminous OLED can be rotated to the best viewing angle; three panel keys set flow and temperature alarm points on site.
OUT1–OUT3 are user-configurable as flow alarm (NPN/PNP), temperature alarm, 4–20 mA flow or 4–20 mA temperature, plus a pulse output – flexible for your PLC requirements.
The overall range is 0.04–10 m³/h: DN4 0.04–0.25, DN6 0.1–0.6, DN10 0.2–1.2, DN15 0.6–6, DN20 0.8–8, DN25 1–10 m³/h, with extended ranges available.
HNF20-A Turbine Flow Meter with Temperature & OLED Datasheet (PDF)
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Send us pipe thread, flow range, medium temperature/pressure, output configuration and accuracy class, and we will confirm whether HNF20-A 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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