The YF-C3 is an ultra-compact clamp-on ultrasonic flow meter built around one idea: make measurement easy. Its patented magnetic snap-on bracket is pre-assembled at the factory — just place the unit on the pipe and the clamps self-align and lock magnetically, then tighten four M4 screws. No tools, no coupling mess, no pipe cutting — installation in minutes.

Designed for small to medium pipes (OD 9–277 mm, DN6–DN100+), the YF-C3 is available as an integrated clamp-on unit or a split (remote) version, with standard aluminium-alloy or PTFE-coated anti-corrosion housings, and medium-temperature options up to 120 °C.

Key Features

Magnetic snap-on bracket — tool-free, self-aligning installation
Small-pipe specialist: OD 9–277 mm (DN6–DN100+)
Integrated clamp-on or split (remote) configuration
4–20 mA, RS485 (Modbus) and OCT outputs
Aluminium-alloy or PTFE-coated anti-corrosion housing
Standard (70 °C) and high-temperature (120 °C) transducer options
Non-contact, no pressure drop, no moving parts

Specifications

Product Name	Clamp On Ultrasonic Flow Meter
Accuracy	±2.0% (0.5m/s – 5.0m/s)
Flow range	0.1m/s – 5.0m/s
Pipe Diameter Range	OD:9mm – 277mm (including 18 specifications) See Page 19 for details
Linearity	±2.0% (0.5m/s – 5.0m/s)
Repeatability	0.80%
Response Time	500ms
Display screen	1.3″ 128*64 OLED Display supports forward/reverse rotation (easy to read)
Menu Language	English
Display unit	Metric and Imperial units are available, m³/h、LPM、GPM、L/s、LPH (Default unit: m³/h)
Display data	Flow rate、 Flow velocity、 Net totalizer、 Single totalizer、 Day-Month-Year totalizer
Totalizer Digit Cap.	7-digit totalizer
Cumul. Data Period	10 years, 64 months, 64 days
Keypad	4 touch keys
Calendar battery	CR1220
Power supply	24VDC@3W
Analog output	4-20mA (Maximum load 600Ω)
Communication output	RS485 (Support Modbus RTU Communication output protocol)
Signal output	Flow rate alarm、Totalized pulse etc. (Optional)
IP Rating	IP54
Ambient Humidity	0% – 95% relative humidity, Non-condensing

Full accuracy and electrical specifications vary by configuration and are confirmed with your quotation.

Applications

Small-bore process lines, water treatment and purification, chemical dosing, cooling water, HVAC, OEM equipment integration, and any tight space where a conventional meter cannot be installed.

Wholesale & OEM

YS-Flux supplies ultrasonic flow meters in volume for export and wholesale distribution, and provides complete OEM / private-label manufacturing: custom logo and branding, neutral or customized packaging and color boxes, tailored manuals and labeling, and configurable specifications to match your market. Distributors and brand owners are welcome to request a quote for bulk pricing and OEM options — see our OEM services.

Request a Quote

This is an inquiry-based (RFQ) product. Tell us your pipe size, fluid, temperature, required outputs and quantity, and our engineers will recommend the right configuration. Request a Quote →

Magnetic Clamp-On Flow Meter

Compact Clamp-on Ultrasonic Flow Meter Model YF-C3

Compact Clamp-on Ultrasonic Flow Meter Model YF-C3M

Compact Clamp-on Ultrasonic Flow Meter Model YF-E5