RBEF-E Low Flow Inductive Magmeters

RBEF-E Mini Magmeter with LCD Display
  • RBEF-E Mini Magmeter with LCD Display
  • Blind Low-Flow Magnetic Inductive Sensor (VIM Type)
  • Miniature Magnetic Flow Meter G1" Connection
  • RBEF-E Mini Low Flow Magnetic Flowmeter with PEEK Liner for Chemical Dosing

The RBEF-E Mini Low Flow Inductive Magnetic flow meter DN3 to DN50(Mini flow sensor) extremely compact, low cost, low flow inductive magnetic flow meter(including Transmitter and sensor), the Mini Inductive Magnetic flow meter is Full Bore for Low-Flow Measurement and the perfect solution for measuring the flow of conductive liquids in applications where reliability and low-pressure loss of a magmeter are desired at an economical price compared to higher end models. This magmeter measures flow using the magnetic-inductive principle. According to Faraday’s law of magnetic induction, current is induced into a conductor as it moves through a magnetic field. The amount of current induced is directly proportional to the velocity of the moving conductor.  A conductive liquid passing through the flowmeter body acts as the conductor. The flowmeter body contains a set of electromagnetic coils that generate the magnetic field. Electrodes mounted in the flowmeter body collect the current, whose magnitude is proportional to flow rate. 

 

RBEF-E Mini Inductive Magnetic flow meter(magmeters) is special designed liquid flow monitoring in industrial processes such as for food and beverages, Chemical and Pharmaceutical filling controller, plumbing applications. The Magmeters is ideal for use in the field of mechanical engineering and plant construction for applications with conductive liquids in tight spaces, e.g. in cooling lines of welding equipment, bending machines and robots or on chemical dosing skids, Dosing skids for reagents and catalysts or chemicals. . No Moving Parts, RS485, Frequency and 4 to 20 mA Output, Maintenance-Free, Minimum inlet section requirements and the instrument is available in three different sizes. All Inductive Magnetic flow meters(mag meters) will be delivered with a works calibration certificate.

R&B Instrument Inc. has a wide range of flow solutions with high quality, accuracy, and reliability. With over 20 years of flowmeter experience, our technologies can provide a solution for virtually all flow applications.

RBEF-E Mini Low Flow Inductive Magnetic Flowmeter (DN3 - DN50)

The RBEF-E series by RB Flowmeter is a high-precision, miniature electromagnetic flowmeter specifically engineered for micro-flow measurement of conductive liquids. Designed for industrial automation, it supports ultra-low flow rates starting from 2L/h, providing a reliable, maintenance-free solution with no moving parts and minimal pressure loss.

For non-conductive liquids or clean water applications, please refer to our low flow Flow Sensor .

Looking for other micro-flow solutions? Check our [Micro Clamp-on Ultrasonic Flow Meter] for non-invasive measurement or [Coriolis Mass Flow Meters] for high-viscosity fluids

Description

  • Principle
  • Features
  • Specification
  • Model Selection
  • Applicants
  • Download
Principle

The magnetic flow meter(magmeters), also technically an electromagnetic flow meter or more commonly just called a mag meter. A magnetic field is applied to the metering tube, which results in a potential difference proportional to the flow velocity perpendicular to the flux lines. The physical principle at work is electromagnetic induction. The magnetic flow meter requires a conducting fluid, for example, water that contains ions, and an electrical insulating pipe surface, for example, a rubber-lined steel tube.

If the magnetic field direction were constant, electrochemical and other effects at the electrodes would make the potential difference difficult to distinguish from the fluid flow induced potential difference. To mitigate this in modern magnetic flowmeters, the magnetic field is constantly reversed, cancelling out the electrochemical potential difference, which does not change direction with the magnetic field. This however prevents the use of permanent magnets for magnetic flowmeters.


Features

RBEF-E Mini Low Flow Inductive Magnetic flow meter /flow sensor Features:

  • From 2L/h
  • Small pipe size: DN3, 6，12，25, 50
  • Full-bore design, no additional pressure drops 
  • are designed for continuous measurement of many conductive liquids.
  • Magneto-Inductive Technology with No Moving Parts
  • Compact and Mini type design
  • Display and Blind for optional
  • Economically Priced
  • Liner: PEEK; Peek +EPDM seal
  • Temperature measuring for optional
  • For Use with a Wide Variety of Conductive Liquids, Acids and Caustics
  • Aluminum Body w/SS316L Electrodes or Aluminum Body with HC Electrodes
  • With display and Blind version;
  • Output: 4-20mA, Pulse, Modbus and Relay for optional

 

Key Technical Advantages:

  • Precision Performance: Achieves ±0.5% accuracy with a wide turndown ratio.

  • Robust Materials: Features a high-performance PEEK liner and versatile electrode options (SS316L, Hastelloy C, Titanium, Tantalum) for corrosive chemical compatibility.

  • Compact Integration: Extremely small footprint (DN3-DN50) ideal for chemical dosing skids, robotic welding cooling lines, and food/beverage filling machines.

  • Smart Connectivity: Supports 4-20mA, Pulse, and RS485 Modbus outputs for seamless integration into PLC and IoT systems.

Whether you are monitoring pulsating metering pumps or managing automated animal feeding systems, the RBEF-E offers the perfect balance of high-end electromagnetic technology and economical pricing. 


Specification

 RBEF-E Mini Low Flow Inductive Magnetic flow meter technical Specification:  

  •  Size: DN3, 6，12，25, 50,
  • The flow Range: DN3: 2-300L/h; DN12: 50-1500L/h; DN25:0.4-10m3/h; DN50:1.5-40m3/h
  • Velocity range: 0.01m/s – 10 m/s
  • Accuracy: ±0.5% of RS (Velocity>0.6m/s) or ±3mm/s(Velocity≤0.6m/s)
  • Repeatability: 1/3 of accuracy
  • Temperature: PT1000, 0.1℃ resolution
  • Media Conductivity: 10 us/cm
  • Measuring Direction: Bi-directional measurement
  • Max Working Pressure: 1.6MPa
  • Ambient Temperature: -10 …60°C
  • Medium Temperature:-10…70°C
  • Liner: PEEK
  • Electrodes: SS316L or HC, Hb, Ti,Ta
  • Enclosure: Aluminum, IP67 for Blind version; IP65 for with display
  • Connection: G1/2 or NPT 1/2, G1, G2
  • Power supply: 24VDC, ≤100mA
  • LCD display: flow rate and total flow
  • Analog output: 4 – 20mA
  • Pulse output: 0 – 5K Hz
  • RS485 Modbus: Optional for Display version, Standard for Blind version

 


 

Model Selection

RBEF-E Mini Low Flow Inductive Magnetic flow meter Model Selection:

RBEF-E Mini Magnetic Inductive Flow Meter Model Selection

 

Pipe Size 

3-6 

DN6   (2 to 300L/h)

12 

DN12  (50 to 1500L/h)

25 

DN25  (0.4-10m3/h)

50 

DN50  (1.5 to 40m3/h)

 

Power 

D 

24VDC∓20% (19.2VDC to 28.8VDC)

 

Display 

N 

Blind(IP67)

NH 

Blind + Handheld (RS485 communicator)

D 

With Display(IP65)

 

Electrode 

S 

SS316L

Hc 

Hc

Hb 

Hb

Ti 

Ti

 

Liner 

PK 

PEEK

PE 

PEEK + EPDM for Sanitary type

 

Output 

A 

4-20mA

P 

Pulse

M 

RS485-Modbus

S 

Batching Control

 

Input 

N 

Without temperature sensor

T 

With temperature sensor

 

Temperature

1 

80℃ for PEEK

2 

Special, clarify

 

Connection Type 

G1/2 

G 1/2"-ISO 228 external

NPT1/2 

NPT1/2 "

G1 

G 1"-ISO 228 external

G2 

G 2"-ISO 228 external

DIN 

DIN Flange(SS304)

ANSI 

ANSI Flange (SS304)

S 

Others, pls clarify

 

Flow range 

1 

0.3 to 0.6m/s

2 

More than 0.6m/s

 

Shell type 

I 

H=100

II 

H=69; Pipe size is less than DN25

 

Remark: 

  1. RS485 Standard for Blind version; Display is optional; 
  2. Handheld RS485 communication is for optional; 
  3. Special demands, pls inquire, can be customized.

 

Applicants

RBEF-E Mini Low Flow  Inductive Magnetic flow meter(magnetic flow sensor) Applications：

 Special are designed for low-flow chemical injection or difficult to meter applications with pulsating metering pumps, corrosive fluids, food and beverage applications,  Flow monitoring, flow measuring, dosing and counting, etc.

  • Food & Beverages: 
  • Mobile flow system for beer, cider and cleaning agents
  • Modular dosing system for dosing filling conductive liquids in packaging machinery(flow meter filling machine)
  • Water
  • Soft drinks, Milk and Dairy, Beer, Fruit juices and other fluids with fibres
  •   Chemical Process Control; 
  •   Cooling systems and cooling circuits: HVAC, Semiconductor industry, etc.
  •    Pharmaceutical;
  •    Plumbing applications
  •    For Automated Animal (such as Calf, pig and chicken) Feeding Systems
  • For utilities and industrial automation: is designed to fit in applications with little installation space available such as in cooling lines of welding equipment, bending machines and robots, or on chemical dosing skids.
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