Product Overview

The Caliper Ultrasonic Flow Meter is a non-invasive device that uses transit-time ultrasonic signals to measure fluid velocity and volumetric flow in closed pipelines. It is generally applied in full pipe conditions with relatively stable flow profiles.

Technical Specifications

Category	Parameter	Specification
Measurement Performance	Velocity Range	0.01–12 m/s (bi-directional, low cut-off 0.03 m/s)
	Accuracy (Clamp-on)	±0.5%–±1.0%
	Accuracy (Inline)	±0.2%–±0.5%
	Repeatability	0.15%–0.20%
	Response Time	0.2 s (0.1–99 s adjustable)
Acoustic System	Frequency	0.5 / 1.0 / 2.0 MHz
	Path Type	Single / Dual / Multi-path
	Mounting	Clamp-on / Insertion / Flanged
Pipe & Fluid	Pipe Size	DN15–DN6000
	Fluid	Water, wastewater, cooling water
	Turbidity	<20,000 ppm
	Straight Run	≥10D upstream / ≥5D downstream
Environment	Sensor Temp	-30°C to 90°C
	Transmitter Temp	-20°C to 60°C
	Protection	IP68 sensor / IP67 transmitter
	Hazardous Area	Ex d IIB T6 Gb
Electrical / I/O	Power	DC 24V / AC 85–264V
	Analog Output	4–20 mA
	Pulse Output	OCT 0–10 kHz
	Relay Output	SPDT 1A @ 30VDC
	Communication	RS485 Modbus RTU / HART / Profibus PA

Industry Applications & Fluids

Industry	Fluid Type	Application
Municipal Water	Potable Water / Wastewater	Flow monitoring in distribution mains
Chemical Processing	Acids / Solvents	Dosing and consumption tracking
Oil & Gas	Crude Oil / Refined Products	Pipeline transport monitoring
Power Generation	Cooling Water / Condensate	Flow measurement for thermal systems
HVAC & Building	Chilled Water / Glycol	Energy sub-metering in HVAC loops
Food & Beverage	Water / Process Liquids	CIP and hygienic flow control

Core Technologies & Advantages

1.Anti-Attenuation Signal Penetration
Acoustic waveforms can pass through pipe walls and light scaling, though signal strength may vary with pipe conditions.

2.Active Pipeline Noise Filtering
Hardware filtering helps reduce pump vibration and background noise under normal industrial operating conditions.

3.Factory-Matched Transducers
Transducers are pre-calibrated for common pipe materials before shipment to reduce installation adjustment time on site.

4.Adaptive Flow Profile Correction
The system adjusts for changes in flow profile such as Reynolds number variation and turbulence, depending on installation and actual flow conditions.

Factory Capabilities & OEM

15,000 m² production facility with an annual output capacity of about 50,000 units, depending on configuration type and order mix.

Three gravimetric and master-meter calibration lines; Each unit is calibrated before shipment under standard factory test conditions.

In-house piezoelectric ceramic manufacturing and polarization for ultrasonic transducers.

OEM options include logo labeling, housing color selection, and mounting customization.

Firmware customization available for BACnet, Profibus, and project-specific protocols.

Electronic modules are tested through 48-hour thermal cycling to screen early-stage drift under controlled laboratory conditions.

Quality Control & Certifications

Compliance & Certifications

Certification / Standard	Scope & Classification	Quality & Reliability Benefit
ATEX / IECEx	Zone 1 & 2; Ex d IIB T6 Gb	Explosion-proof for hazardous areas
CE / EMC	EN 61326-1 EMC standard	EMC resistance to electrical interference
ISO 9001:2015	Manufacturing system	Consistent production quality
IP68	Submersible up to 10 m	Water and dust protection
NTEP / MID (Optional)	Class 0.5 custody transfer	Billing-grade measurement accuracy
RoHS / REACH	Material compliance	Restricted hazardous substances

Quality Control

Multi-Point Laser Wall Alignment: Robotic inspection systems check transducer alignment with a deviation control target of ±0.1°.

Sub-Nanosecond Time-Loop Simulation: A 10,000-pulse test is used to evaluate timing stability of signal processing.

Three-Axis Vibration Screening: Enclosures are tested under 2G vibration conditions to check mechanical durability.

72-Hour Environmental Stress Screening: Electronics are cycled between -20°C and 60°C to stabilize parameter drift.

FAQ

Q: Can your factory pre-configure custom Modbus register mapping to match our existing PLC templates?

A: Yes. We can configure Modbus register mapping according to your PLC requirements before final calibration.

Q: What specific maintenance schedule does the clamp-on sensor acoustic coupling gel require in outdoor settings?

A: We recommend checking the coupling gel condition and replacing it roughly every 24 months depending on site conditions.

Q: Can the factory provide material traceability certificates for the wetted parts of insertion sensors?

A: Yes. Material certificates (EN 10204 3.1) can be provided for wetted parts upon request.

HNF00-B Clamp-on Ultrasonic Flowmeter Specifications
Specific Parameters	Value / Description
Measurement Principle	Ultrasonic Transit Time Method: During the measurement process, two piezoelectric (PZT) crystals inside the sensor are located at downstream and upstream positions, sending and receiving ultrasonic signals in an alternating manner. The ultrasonic waves penetrate the pipe wall at an angle and propagate into the liquid. The flow of the liquid affects the propagation of ultrasonic waves, causing the transmission time of ultrasonic waves in the counter-flow direction to always be greater than that in the flow direction. By precisely analyzing the difference in transmission time between these two directions and based on its proportional relationship with the liquid velocity, the sensor can quickly and accurately calculate the volumetric flow rate of the liquid.
Nominal Diameter Range	DN15-DN50
Wetted Parts Material	PC Engineering Plastics, no liquid-contact parts
Connection Method	Tube Thread Installation
Maximum Measurement Error	Low flow: ±10mL/min High flow: ±2% RD
Measurement Range	0-30000mL/min
Maximum Process Pressure	0.3MPa
Medium Temperature Range	0℃ - 60℃
Ambient Temperature Range	-10°C to -50°C
Transmitter Housing Material	Metal pipes: Stainless steel pipe, Carbon steel pipe ,Copper pipe Plastic pipes: PVDF , PPH ,PVC ,CPVC , PDA ,PU ,PPR ,HDPE
Display/Operation	4-wire backlight display with touch function (can be operated externally) Supports configuration settings via local display and operating tools Optional remote display function 1.54″ TFT-LCD color screen, resolution 240*240
Inputs	0
Outputs	4-20mA RS485 Customization
Power Supply	12-30VDC
Certificate	CE Certification
Functional Safety	Functional safety complies with IEC 61508 standard, allowing its use in safety applications as specified by IEC 61511 standard.
Ordering Information	0

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