Guiyang.bai@honno-auto. com
86-13840589744
This Clamp-On Ultrasonic Flow Sensor is a precision, electronics-integrated OEM component designed to be clamped onto flexible plastic tubing – silicone, PVC, PTFE, PFA, FEP, TPE, PE and PUR hoses with smooth surfaces – from 4 to 35 mm outer diameter. It measures liquid flow from a few mL/min up to 100 L/min with ±3% of reading accuracy, using ultrasonic transit-time technology with two PZT crystals. Its non-contact, non-contaminating design is trusted in medical and biopharmaceutical equipment: ECMO and heart-lung machines, hemodialysis and blood purification systems, blood pumps, feeding pumps, chromatography skids, upstream/downstream bioprocess feed lines and filtration systems. Each unit is factory-calibrated against your specific tubing, liquid and temperature (default water calibration at 22 ± 3 °C) and ships with a calibration report; field zero-calibration is supported via digital input or PC software. Outputs: digital NPN/PNP/push-pull (configurable as flow switch, bubble detection, filling or pulse), frequency 0–20 kHz, current/voltage output (5 V / 10 V selectable) and RS-485 bus for up to 12 sensors. 12–30 VDC, IP65 aluminum housing, 8-pin connector. Optional accessories: flow monitoring PC software with USB converter, and a remote display unit.
The HNF00-B-G is a non-invasive OEM ultrasonic flow sensor using transit-time technology. Two PZT crystals sit upstream and downstream, alternately transmitting and receiving angled ultrasonic signals through the tube wall – simply clamp it onto the outside of flexible tubing.
The sensor never contacts the liquid: zero contamination, no blockage, no dead volume – hygienic and safe. It fits smooth flexible tubing in silicone, PVC, PTFE, PFA, FEP, TPE, PE and PUR from 4 to 35 mm OD, covering low flows from a few mL/min up to 100 L/min. Each unit is factory-calibrated against your specific tubing, liquid and temperature with a calibration report; bidirectional flow, volume totalisation and bubble detection are built in.
Tubing OD: 4 – 35 mm Flow: few mL/min – 100 L/min Accuracy: ±3% of reading Outputs: 4-20mA / 0-10V / 0-20kHz / RS485 / NPN-PNP Protection: IP65 · aluminium housing
Applications: ECMO & extracorporeal life support, heart-lung machines, hemodialysis & blood purification, blood pumps, enteral feeding pumps, biopharma chromatography, upstream/downstream bioprocess feed, tangential flow filtration, sterile filtration & vaccine production, pharmaceutical filling, laboratory, industrial filling & spraying, cooling & lubrication, water & wastewater treatment.
Select this model when all of the following conditions are met:
The tubing is smooth flexible tubing (silicone, PVC, PTFE, PFA, FEP, TPE, PE, PUR).
Tubing OD is between 4 and 35 mm, and flow is low (a few mL/min up to 100 L/min).
The medium is water or another acoustically transparent liquid at 0–60 °C.
The sensor must not contact the liquid (medical, biopharma, high-purity, single-use tubing).
OEM integration needs flexible outputs: 4–20 mA / 0–10 V / frequency / RS485 / NPN-PNP.
Factory custom calibration against the specified tubing, liquid and temperature with a calibration report is required.
Please consult us first if: tubing OD exceeds 35 mm, wall is too thick or not smooth, the medium carries many bubbles or solids, temperature exceeds 60 °C, or explosion-proof / higher ingress protection is required.
The sensor clamps on outside the tube and ultrasound passes through the wall – it never touches the liquid. Zero contamination and zero cross-infection risk, ideal for ECMO, dialysis and biopharma single-use circuits.
Each unit is factory-calibrated against customer-specified tubing, liquid and temperature (default 22±3 °C water) with a calibration report. On-site performance matches the nominal accuracy when the same tubing and liquid are used.
Current 0/4-20/24 mA, voltage 0-5/10 V, frequency 0-20 kHz, RS485 (up to 12 sensors on a bus), and NPN/PNP/PUSH-PULL digital outputs configurable as flow switch, bubble detection, filling or pulse, plus a digital input for zero calibration / reset / start filling.
Forward/reverse flow measurement with volume totalisation. The digital output can be configured for bubble detection during filling and dispensing, supporting process judgement and alarming.
| Model | HNF00-B-G Mini Clamp-On Ultrasonic Flow Sensor |
|---|---|
| Principle | Ultrasonic transit-time; two PZT crystals upstream/downstream alternately transmit/receive angled signals |
| Tubing types | Silicone, PVC, PTFE, PFA, FEP, TPE, PE, PUR and other smooth flexible tubing |
| Tubing OD range | Approx. 4 – 35 mm (by size code, see table below) |
| Flow range | A few mL/min – 100 L/min (by size code; max approx. 0–100000 mL/min) |
| Accuracy | ±3% of reading (RD); low-flow band given as absolute error per size (e.g. ±6–270 mL/min) |
| Calibration | Default 22±3 °C water; custom calibration for customer tubing/liquid/temperature, with report |
| Measured liquids | Water or other acoustically transparent liquids |
| Liquid temperature | 0 … 60 °C |
| Ambient temperature | 0 … 60 °C; storage −20 … 70 °C |
| Operating humidity | 10% – 90% RH (non-condensing) |
| Protection | IP65 |
| Housing | Aluminium alloy |
| Supply voltage | 12 – 30 VDC; max. 20 mA (no external load) |
| Electrical connection | 8-pin push-pull locking connector |
| Output signals | Current 0/4-20/24 mA; voltage 0-5/10 V; frequency 0-20 kHz; RS485 (up to 12 sensors); digital NPN/PNP/PUSH-PULL (flow switch/bubble detection/filling/pulse, max 100 mA) |
| Digital input | Zero calibration, volume reset, start filling, etc.; ground time > 20 ms |
| Mounting | Thread mounting or free hanging; shielded by grounding the wire |
| Code | Flow range (mL/min) | Tubing OD | Tubing ID |
|---|---|---|---|
| 016NS | 0 – 2000 | 5/32" (4 mm) | 1/16" (1.6 mm) |
| 019NS | 0 – 2000 | 3/16" (4.8 mm) | 1/16" (1.6 mm) |
| 025NS | 0 – 3000 | 1/4" (6.4 mm) | 1/8" (3.2 mm) |
| 032NS | 0 – 6000 | 5/16" (7.9 mm) | 3/16" (4.8 mm) |
| 038NS | 0 – 8000 | 3/8" (9.5 mm) | 1/4" (6.4 mm) |
| 044NS | 0 – 9000 | 7/16" (11.1 mm) | 5/16" (7.9 mm) |
| 050NS | 0 – 10000 | 1/2" (12.7 mm) | 3/8" (9.5 mm) |
| 056NS | 0 – 12000 | 9/16" (14.3 mm) | 3/8" (9.5 mm) |
| 063NS | 0 – 14000 | 5/8" (15.9 mm) | 3/8" (9.5 mm) |
| 075NS | 0 – 20000 | 3/4" (19.1 mm) | 1/2" (12.7 mm) |
| 100NS | 0 – 50000 | 1" (25.4 mm) | 3/4" (19.1 mm) |
| 125NS | 0 – 100000 | 1-1/4" (31.8 mm) | 3/4" (19.1 mm) |
| 138NS | 0 – 100000 | 1-3/8" (35 mm) | 7/8" (22.2 mm) |
Confirm 4 items before ordering:
Tubing material, OD and ID – to match the size code (send a ≥50 mm tube sample if possible).
Liquid type, temperature and normal flow – for custom calibration and range selection.
Output signal type (current/voltage/frequency/RS485/digital) and OEM control-system interface.
Digital output configuration (flow switch/bubble detection/filling/pulse) and digital input trigger.
Clamp the sensor on a straight section with a clean, smooth outer surface free of bubbles. Wire the 8-pin push-pull connector: pin 1 white GND, 2 brown +V, 3 green current/voltage, 4 yellow RS485-B, 5 grey RS485-A, 6 black frequency, 7 blue digital out, 8 red digital in. Use the same tubing and liquid as factory calibration; trigger zero calibration via the digital input (ground >20 ms) before reading.
Current output: 0/4-20/24 mA selectable, load ≥100 Ω; max load scales with supply (12V/250Ω, 24V/1000Ω, etc.).
Voltage output: 0-5V or 0-10V selectable, load ≥1 kΩ, direct to PLC analogue modules.
Frequency output: 0-20 kHz, 5V (12-30V optional), for high-speed counter totalisation.
RS485 bus: up to 12 sensors on one bus for multi-line central monitoring.
Digital out/in: NPN/PNP/PUSH-PULL configurable as flow switch, bubble detection, filling or pulse (max 100 mA); digital input for zero calibration, reset and start filling.
For OEM projects, please send a tubing sample (≥50 mm), liquid type and temperature so we can recommend the most precise custom calibration and size code.
Non-contact blood-flow monitoring on ECMO and heart-lung machines; the sensor never contacts blood and fits single-use circuits, reducing cross-contamination risk.
Used on dialysis machines, blood purification devices, blood pumps and feeding pumps to monitor flow and bubbles in real time, triggering alarms for patient safety.
Installed on chromatography, upstream/downstream bioprocess feed, tangential flow filtration and sterile filtration – single-use tubing needs no sensor sterilisation and meets GMP cleanliness.
Digital outputs support quantitative filling and bubble detection on pharma filling and vaccine lines, improving batch consistency and yield.
Small-flow monitoring for industrial filling, spraying, cooling and lubrication systems, and water/wastewater treatment – flexible outputs, clip-and-go.
To confirm the correct HNF00-B-G configuration, please provide: tubing material, OD and ID (a ≥50 mm sample preferred), liquid type & temperature, normal and maximum flow, output signal type, digital out/in configuration, supply voltage and mounting method. If necessary we will request additional details on tube surface condition and ambient conditions.
Silicone, PVC, PTFE, PFA, FEP, TPE, PE, PUR and other smooth flexible tubing with OD 4–35 mm, matched by size code.
Yes. The sensor clamps on outside the tube and ultrasound passes through the wall – it never touches the liquid, making it ideal for medical and biopharma use.
No. The digital input can be configured for zero calibration, volume reset or start filling – just ground it for >20 ms, no PC connection needed.
Default factory calibration is at 22±3 °C water; custom calibration against customer-specified tubing, liquid and temperature is available, with a calibration report per unit.
The digital NPN/PNP/PUSH-PULL output can be configured as flow switch, bubble detection, filling or pulse (max 100 mA), alongside 4–20 mA, 0–10 V, 0–20 kHz frequency and RS485.
HNF00-B-G Clamp-On Ultrasonic Flow Sensor Datasheet (PDF)
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Send us a tubing sample (≥50 mm), liquid type & temperature, flow range and output type, and we will confirm whether HNF00-B-G is suitable and provide a custom-calibration 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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