Portable Ultrasonic Flow Meter for Water

Parameter

Specification / Value

Tolerance / Limits

Measurement Performance

Measurement Principle

Transit-time ultrasonic method

N/A

Flow Velocity Range

±0.01 to ±12 m/s (bidirectional)

±0.005 m/s threshold

Measurement Accuracy

±1.0% of reading (>0.2 m/s)

±0.2% (calibrated)

Repeatability

0.2%

±0.05%

Pipe Size Range

DN15–DN100 / DN50–DN700 / DN300–6000

±1 mm inner diameter input

Compatible Pipe Materials

Steel, stainless steel, cast iron, PVC, HDPE, copper, FRP

Liner thickness ±0.1 mm

Fluid Type

Water, wastewater, river, chilled/hot water

Solids <10,000 ppm

Electrical & Power

Power Supply

3.7V rechargeable battery; 100–240 VAC charger

±10% voltage

Battery Life

≥14 hours continuous operation

±1 hour

Data Logging

Internal memory / 32 GB SD card

Time sync ±1 sec/day

Signal Inputs & Outputs

Analog Output

4–20 mA (≤750 Ω load)

±0.1% FS

Digital Communication

USB Type-C / RS485 Modbus RTU

±1% baud stability

Pulse Output

OCT pulse (0–5 V)

±5 μs

Analog Input

Dual 4–20 mA / PT1000 support

±0.1°C

Environmental & Physical

Operating Temperature

Transmitter: −20°C to +60°C / Sensors: −30°C to +90°C

±2°C

Protection Rating

IP65 (main unit) / IP68 (transducers, ≤2 m)

IEC 60529

Dimensions

210 × 100 × 35 mm

±2 mm

Weight

0.65 kg (with battery)

±0.05 kg

Category

Regulatory Standard / Framework

Factory Alignment & Verification

Quality Management

ISO 9001 Certified Facility

Production follows audited quality control system

Electrical Safety

CE Compliance

Electronics meet EU EMC and low-voltage directives

Flow Traceability

NIST Traceable Standards

Calibration referenced to certified master meters

Hazardous Areas

IEC Ex-Proof Standards

Selected models support intrinsic safety design

Environmental Safety

RoHS Compliance

Restricted use of hazardous substances in components

Testing Methodology

VDI/VDE 2640 Guidelines

Ultrasonic testing follows recognized procedures

Item Category

Component Name

Included / Optional

Standard Quantity / Provision

Standard Kit

Handheld Transmitter

Included

1 unit

M2/S2 Transducers

Included

1 pair

Signal Cables (5 m)

Included

2 pcs

Clamps / Mounting Chains

Included

1 set

Coupling Compound

Included

1 bottle

Carrying Case

Included

1 unit

Optional

Large Pipe Transducers

Optional

Available on request

High-Temperature Transducers

Optional

Available on request

Ultrasonic Thickness Gauge

Optional

Available on request

Application Field

Typical use

Municipal Water

Clamped on water mains for bulk flow measurement

HVAC & Cooling

Installed on chilled water pipes for energy balancing

Industrial Process

Used on process pipelines for consumption monitoring

Wastewater Control

Installed on effluent discharge lines

Building Management

Used for multi-point sub-metering checks

Agricultural Irrigation

Mounted on distribution pipelines for flow tracking

HNF110-A Handheld Ultrasonic Flow Meter Parameters

Specific Parameters

Value / Description

Measurement Principle

When an ultrasonic beam propagates in a liquid, the flow of the liquid will cause a slight change in the propagation time, and this change in propagation time is proportional to the flow rate of the liquid. At zero flow, the time required for the two sensors to emit and receive sound waves is exactly the same (the only technology that can actually measure zero flow), and when the liquid flows, the transmission time of the sound wave in the counter-flow direction is greater than that in the downstream direction.

This relationship complies with the following expression:

Where:
θ: the angle between the beam and the direction of liquid flow
M: the number of straight-line propagations of the sound beam in the liquid
D: the diameter of the pipe
Tup: propagation time of the sound beam in the positive direction
Tdown: propagation time of the sound beam in the counter direction
ΔT = Tup - Tdown

Nominal Diameter Range

15mm-6000mm

Measurement Accuracy

Flow ±1%, linearity ±0.5%; Heat ±2%; P3 accuracy calibrated to ±0.5% as per customer requirements

Flow Rate

0~±10m/s

Medium Temperature Range

Normal temperature type: -30~90℃; High temperature type: -30~160℃

Ambient Temperature Range

Host: -20~60℃; Sensor: -20~60℃

Measuring Medium

Water, sea water, industrial wastewater, acid-base solutions, alcohol, beer, various oils, and other single homogeneous liquids capable of conducting ultrasound

Transmitter Housing Material

Steel, stainless steel, cast iron, PVC, copper, aluminum, and all other dense pipes, allowing for lining

Display

6x12 Chinese or 6x25 Western characters backlight LCD display, supports five languages: Chinese, English, Italian, Spanish, and Turkish, 16+4 tactile keyboard

Communication Interface

Type-C interface, can connect to computers or charge

Communication Protocol

RS485, Modbus Protocol

Data Storage

Built-in data logger that can store 16,500 sets of measurement data

Signal Output

Customized to customer requirements

Power Supply

Built-in high-capacity NiMH rechargeable battery, also can use three alkaline batteries, supports a continuous measurement for over 10 hours, with a power adapter, uninterrupted measurement can be achieved

Wetted Parts Material

Flame Retardant ABS

External Dimensions

208*102*48