RBFM-K Compact Clamp-on Micro Ultrasonic Flow Meter

RBEF-K small pipe ultrasonic flowmeter for low flow water measurement

RBFM-K Compact Clamp-on Micro Ultrasonic Flow and Heat Meter(Transmit-time) is quick and easy to install and For DN12-DN65, even by non-trained operators, the clam-shell design of this range makes them a fast and reliable solution for non invasive flow and/or heat measurement applications. As the sensor seperation distance is fixed, there is no need for adjustment and once fitted they are not easily disturbed. RBFM-K is special designed for small and mocro pipe size.

Install in seconds, measure with precision. The RBFM-K Compact Clamp-on Micro Ultrasonic Meter is the ultimate solution for small pipe flow and heat energy monitoring. With its all-in-one integrated design, you can complete installation in minutes without cutting pipes or stopping production. Ideal for chilled water, hot water, and pure water applications in HVAC and industrial automation.

Specifications:

Pipe Size: DN15 - DN40 (Small pipe series).
Accuracy: ±1.0% or better.
Measurement: Flow Rate, Total Flow, Heat/Energy (Optional).
Output: 4-20mA, RS485 Modbus, LoRaWAN (Optional).
Media Temp: 0—65℃ or 0—115℃

Key Advantages:

Zero Downtime: Clamp-on design allows installation without interrupting the system.
Micro Size: Fits into tight spaces where traditional meters cannot be installed.
High Sensitivity: Accurately captures micro-flow changes in small pipelines.
Maintenance-Free: No moving parts to wear out; no risk of leaking or clogging.

Description

Principle
Features
Specification
Model Selection
Applicants
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Principle

Features

RBFM-K Compact Clamp-on mirco UltrasonicFlow and Heat Meter(flow sensor) features:

Available in1/2” – 1-1/2″ (15-65 mm) pipe sizes
Liquid compatibility or Pressure is not an issue;
Transducer temperature range: 0—65℃ or 0—115℃
No professional product knowledge required, installation and measurement is quick and easy.
No moving parts or pressure loss changes involved;
Installation can be done without systems shut-down or flow interuption
Mostly Clean and non-aerated liquids only (See Doppler type if over 10% Solids or entrained air)
256*128 LCD display. Display a variety of information.
It is optional to become an ultrasonic cooling (heat) meter/ btu meter/ energy meter to realize the monitoring and measurement of energy.

Specification

RBFM-K Compact Clamp-on UltrasonicFlow and Heat Meter specification:

Specifications	Data
Pipe material	Metal /PVC, PP or PVDF rigid plastic pipe
Liquid type	Water/other liquid (Single liquid medium without solid particles or impurities)
Temperature range	0-75℃ (No freezing on the surface)
Low velocity cut off value (Default by factory)	0.1m/s
Display	256*128, LCD
Response time	0.5~60s
Accuracy	±2%, (±1% after calibration)
Data Storage period	300ms
Memory for data backup	EEPROM (Data storage: over 10 years, data read/write frequency: over 1 million times)
Power and I/O connection	M12 type aviation plug
Output	4-20mA
Communication	Modbus RS485
(Options for output)	OCT (pulse output)/ One relay alarm (please contact the factory)
Power supply	10-24V VDC
Electric power	< 3W
Protective circuit	Power reverse connection protection, Power surge protection, Output short circuit protection, Output surge protection
Enclosure protection class	IP65
Environment temperature	-10 to 60°C (No freezing)
Relative humidity	35 to 85% RH (No condensation)
Vibration resistance	10 to 55 Hz, double amplitude 1.5 mm, 2 hours in each XYZ axis
Impact resistant	100 m/s2 16ms pulse, 1000 times each for X, Y and Z axes
Main material	Aluminum, Industrial Plastics

Model Selection

RBFM-K Compact Clamp-on UltrasonicFlow and Heat Meter Model Selection:

RBFM-K Compact Flow/Heat Meter Model Selection
RBFM-K-	Pipe size
	15	DN15
	20	DN20
	25	DN25
	32	DN32
	40	DN40
	50	DN50
	65	DN65
		Fluid type：
		1	water
		2	Others, pls clarify it
			Flow/Heat
			F	Flow
			H	Flow/Heat with Pt1000 temp. sensor
				Ultrasonic Sensor cable
				S	Standard length-2m
				X	Xm cable
					Type of Transducer
					T1	0-65℃
					T2	0-115℃
						Output(only choose 2 out of 4)
						A	4-20mA
						M	Modbus(RS485)
						O	OCT(Frequency)
						R	1pc Relay
							Temperature sensor length
							N	No temp. sensor
							9	Standard length-9m
							15	Extend cable length 15m
							25	Extend cable length 25m

Applicants

RBFM-K Compact Clamp-on Micro UltrasonicFlow and Heat Meter Application:

Chemical Processes
Water Usage
Scrubber | Gas Stacks
Sodium Hypochlorite
Visual Flow Indication
Totalizer – Batching Applications
HVAC SYSTEM;
Semiconductor industry
ETC.

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RBFM-K Compact Clamp-on Micro Ultrasonic Flow Meter

Description

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