Guiyang.bai@honno-auto. com
86-13840589744
HNF100-B wall-mounted split ultrasonic flow meter and heat meter with intelligent hybrid signal-processing host, 2×20 backlit LCD and 16/4-key keypad. Transit-time measurement in single, dual or up to four channels for large pipes, disturbed flow and high accuracy; clamp-on, bracket, insertion or pipe-section transducers, DN15–DN6000. Flow, temperature and pressure on one screen; 3/4-wire PT100/PT1000 supply/return sensors for heat metering.
The HNF100-B is a wall-mounted split-type ultrasonic flow meter and heat meter built around an intelligent hybrid signal-processing host, with a 2×20 dot-matrix backlit LCD and a 16-key or 4-key membrane keypad. The converter is fixed on the wall with four Φ6 expansion bolts or nails. Transit-time measurement between upstream and downstream transducers is available in single-channel and multi-channel versions up to four channels, which suits large pipes, disturbed flow profiles and higher accuracy requirements. Clamp-on, bracket, insertion and pipe-section transducers can all be connected, covering DN15–DN6000. Flow, temperature and pressure can be measured and displayed on the same screen; three- or four-wire PT100/PT1000 sensors on the supply and return legs give cold and heat metering.
The multi-channel host and transducers combine arbitrarily for dual-channel or four-channel measurement, which improves accuracy and reliability on large mains and uneven flow. Clamp-on sensors stick to the pipe surface without cutting the line or stopping the process; insertion and pipe-section options cover lined, buried or high-temperature mains. Over 100 numbered menu windows guide setup of pipe size, material, lining, fluid, transducer type and mounting method, with zero calibration, damping, low-flow cut-off, scale-factor correction and 11+ segment flow linearisation.
Good fit: water supply and drainage, district heating and cooling, HVAC and building energy, industrial process water, chemical and petrochemical, power plant cooling water, metallurgy and steel, water treatment and sewage, pulp and paper, pump and pipeline monitoring, large-pipe flow measurement, energy audit and heat billing, retrofit of existing pipelines.
Choose HNF100-B when:
A large pipe, disturbed flow profile or high accuracy requirement calls for dual- or four-channel measurement.
The host must be wall-mounted and readable, with clamp-on, bracket, insertion or pipe-section transducers to suit site access.
Heat metering, data logging with history query, batch control, alarms and RS485 Modbus integration are required.
Confirm with us first for gases, non-conducting or highly viscous liquids, pressure above the selected transducer rating, or pipes outside the listed materials and sizes.
Upstream and downstream transducers exchange ultrasound alternately. At zero flow the transit times match; flowing liquid shortens the downstream path and lengthens the upstream path, and the time difference is proportional to flow velocity. Single or multiple channels integrate the velocity over the bore. The menu records pipe OD, wall thickness, material, lining and fluid; the converter computes spacing, passes and V/Z method. Acceptance is checked by live signal strength (≥60) and Q value (>60).
| Model | HNF100-B — wall-mounted split ultrasonic flow meter / heat meter |
|---|---|
| Principle | Transit-time ultrasonic; single channel, dual channel or up to four channels |
| Accuracy | Two-channel ±1 %; four-channel ±0.5 % |
| Pipe size | DN15–DN6000 |
| Transducer style | Clamp-on, bracket, insertion or pipe-section |
| Fluid type | Water, seawater, industrial sewage, various oils and other single-uniform sound-conducting liquids |
| Fluid temperature | −30…90 ℃ standard clamp-on; −30…160 ℃ high-temperature clamp-on, insertion and pipe-section |
| Display / keypad | 2×20 dot-matrix backlit LCD; 16-key or 4-key membrane keypad |
| Current output | 4–20 / 0–20 / 0–4–20 mA, accuracy better than 0.1 %; one 4–20 mA channel, load 0–1 kΩ (DC 24 V supply) |
| OCT pulse | Isolated open-collector, DC 60 V / 100 mA; pulse width 6–1000 ms |
| Relay / frequency | Relay output (AC 125 V / DC 28 V, 1 A) or frequency output; cumulative pulse available |
| Alarm | Two flow alarms with buzzer |
| Analog input | 3-way 4–20 mA current input, usable as a data collector; pressure input supported |
| Temperature input | Three-wire or four-wire PT100 / PT1000 on supply and return for heat metering |
| Communication | Isolated RS485, MODBUS ASCII/RTU, M-BUS |
| Data storage | Built-in memory stores 16,500 data sets; timed output and history query of flow, heat, working time and power-off records; built-in batch controller |
| Power supply | AC 110–220 V or DC 8–36 V |
| Transducer cable | Dedicated ultrasonic cable, up to 200 m |
| Mounting | Wall mounted, four Φ6 expansion bolts or nails |
| Style | Use | Temperature |
|---|---|---|
| Clamp-on, room-temperature small / medium / large | Existing pipe, no shutdown; DN15–DN6000 by sensor size | −30…90 ℃ |
| Clamp-on, high-temperature compact / medium / large | Boiler, heat-exchanger and process lines | −30…160 ℃ |
| Bracket / insertion | Large bore, lined or buried pipe, or a surface that cannot be clamped | −30…160 ℃ |
| Pipe-section | High accuracy or special fluid conditions; specified on request | −30…160 ℃ |
Sensors are supplied in room-temperature or high-temperature bodies, sized small, medium or large to match pipe OD. UP (red) marks the upstream transducer and DN (blue) the downstream; a pair carries the same serial code.
| Item | Options | Notes |
|---|---|---|
| Channels | Single / dual / four channel | Multi-channel host combines with sensor pairs per channel |
| Transducer | Clamp-on / bracket / insertion / pipe-section; room or high temperature; small / medium / large | Choose by pipe OD, fluid temperature and access |
| Heat metering | Not fitted | PT100 / PT1000 pair, 3- or 4-wire | Supply and return sensors for cold/heat energy |
| Outputs | 4–20 / 0–20 / 0–4–20 mA, OCT, relay, frequency / cumulative pulse | Configured in the menu |
| Communication | Isolated RS485 Modbus ASCII/RTU, M-BUS | State protocol and baud rate when ordering |
| Power | AC 110–220 V | DC 8–36 V | State the site supply |
| Cable | Standard length on request, up to 200 m | Dedicated ultrasonic cable only |
Full pipe at the measuring point; clean, smooth surface free of scale, rust and paint.
Straight run: 10D upstream and 5D downstream; 30D from a pump outlet or a half-open valve.
Avoid vibration and strong electrical interference; keep away from VFDs and HV cables; ground housing, transducers and cable shield.
Use the dedicated ultrasonic cable in tray or conduit, clear of power cables, up to 200 m.
Acceptance: signal strength ≥60 and Q value >60 before trusting the reading.
Built-in memory stores 16,500 data sets; timed output and history query cover flow, heat, working time and power-off records.
Two alarm channels with buzzer; relay can drive an external alarm or beacon.
Built-in batch controller for preset-volume dosing; 11+ segment linearisation, meter factor, damping and low-flow cut-off (default 0.03 m/s).
Energy and HVAC: district heating and cooling, chilled and condenser water, boiler and heat-exchanger systems, supply/return heat, heat billing.
Water and industry: water supply and drainage, process water, treatment and sewage, chemical and petrochemical, power, metallurgy, pulp and paper.
Monitoring and retrofit: large-pipe flow, pump and pipeline monitoring, energy audit, retrofit of existing pipelines.
Send: pipe outside diameter and wall thickness, material and lining, fluid type and temperature range, normal and maximum flow, required channel count, transducer style, heat metering sensors, outputs, communication, supply and cable length. We will confirm the sensor model and configuration before quoting.
When are multiple ultrasonic channels beneficial?
On large pipes, uneven or disturbed flow profiles and high-accuracy duties, dual- or four-channel measurement averages the velocity profile and improves accuracy and reliability; two-channel accuracy is ±1 %, four-channel ±0.5 %.
Which transducer styles span DN15 to DN6000?
Clamp-on, bracket, insertion and pipe-section transducers can all be connected. Clamp-on fits existing pipes without shutdown; insertion and pipe-section suit lined, buried or high-temperature mains.
Does it support low-flow cutoff adjustment?
Yes. Low-flow cut-off is adjustable in the menu, default 0.03 m/s, together with damping, meter factor and 11+ segment flow linearisation.
How much straight pipe is required near pumps or half-open valves?
Allow 10D upstream and 5D downstream; keep 30D from a pump outlet or a half-open valve, and avoid vibration and strong electrical interference.
What signal strength and quality values are required?
Before accepting the reading, check live signal strength ≥60 and Q value >60; weak or unstable values indicate a poor transducer mounting or surface condition.
Send the pipe size, material, fluid, temperature, channel count and required outputs. We will confirm the transducer model and configuration before quotation.
Send us 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
We chat
