Electromagnetic Flow Devices
Zero-obstruction full-bore flow metering with ±0.5% calibrated accuracy, IP68 submersible flow tube, and automated cloud telemetry.
Introduction
When accuracy counts, eliminate mechanical meter wear.
Mechanical turbine meters clog, lose calibration, and cause heavy pressure drop. Bulfro’s Electromagnetic Flow Monitoring Devices operate on Faraday’s law of induction: having zero moving parts inside the pipe, they never wear out. An IP68 flow tube measures conductive water, wastewater, or chemicals with ±0.5% accuracy, streaming live flow rates and totalisers to your cloud dashboard.
Metering Architecture
Faraday Induction Without Moving Parts
Inside the flow sensor, electromagnetic coils generate a magnetic field perpendicular to the fluid flow. As conductive water moves through this field, an electrical voltage proportional to velocity is induced across opposing electrodes.
Because there are no impellers, gears, or orifices, the flow tube causes zero pressure loss and handles raw river water, municipal sewage, cooling tower loops, and industrial effluents without clogging.
Core Capabilities
Engineered for Lifelong Precision
Meeting all industrial intake, process line, and CGWA groundwater withdrawal monitoring standards.
Bi-Directional Measurement
Measures forward and reverse flow rates accurately, ideal for water storage loops, distribution rings, and recycling systems.
±0.5% Forward & ReverseZero Moving Parts
Completely smooth internal bore without rotating parts, gears, or bearings. Never requires mechanical lubrication or filter cleaning.
Zero Head Loss DesignCellular Telemetry Logging
Integrated 4G / GPRS telemetry unit transmits timestamped cubic meter logs directly to the Bulfro Cloud for CGWA audit compliance.
4G / GPRS / Cloud ReadyEmpty Pipe Detection
Smart electronic electrode impedance monitoring detects air pockets or dry pipes, preventing false cumulative flow totals.
Auto Empty-Pipe AlarmIP68 Submersible Flow Tube
Hermetically sealed sensor coil assembly rated IP68 allows continuous immersion in flooded valve chambers and underground pits.
IP68 (Up to 10m Submersion)Engineering Data
Technical Specifications
| Specification | Details |
|---|---|
| Applicable Medium | Conductive liquids (Conductivity > 5 µS/cm: Raw water, effluent, brine, acids) |
| Nominal Diameter | DN15 to DN1200 (Flanged DIN / ANSI / BS Table standard) |
| Calibrated Accuracy | ±0.5% of reading (optional high-precision ±0.2%) |
| Velocity Range | 0.01 m/s to 15 m/s bi-directional |
| Lining Materials | PTFE (Teflon) / Hard Rubber / Neoprene / FEP |
| Electrode Materials | Stainless Steel 316L / Hastelloy C / Titanium / Tantalum |
| Pressure Rating | PN10, PN16, PN25, PN40 (Standard 16 bar) |
| Fluid Temperature | Rubber: -10°C to +80°C; PTFE: -20°C to +150°C |
| Ingress Protection | Sensor Body: IP68 (continuous immersion); Converter: IP67 |
| Signal Outputs | Isolated 4–20 mA, Pulse/Frequency, RS-485 Modbus RTU |
| Telemetry Interface | Integrated 4G LTE / GPRS IoT Cloud Data Logger |
| Power Supply | 230V AC ± 15% / 24V DC / 3.6V Internal Lithium Battery (5–10 yr life) |
| Regulatory Compliance | ISO 4064, CGWA Mandatory NOC Guidelines, CE Approved |
BEFM Series Flow Meter Models
| Model Code | Pipe Size | Converter Type | Power |
|---|---|---|---|
| BEFM-C-DN50 | DN50 (2 Inch) | Compact Integral Display | 230V AC / 24V DC |
| BEFM-R-DN100 | DN100 (4 Inch) | Remote Wall-Mount Display | 230V AC + 4G Telemetry |
| BEFM-B-DN150 | DN150 (6 Inch) | Battery Powered IP68 | Internal 10-Yr Lithium |
| BEFM-R-DN300 | DN300 (12 Inch) | Remote Industrial SCADA | 230V AC + RS-485 Modbus |
Media Gallery
Hardware & Pipe Mounting
Why Choose Bulfro Mag Meters
Designed for Harsh Industrial Water Piping
Field-proven electromagnetic measurement delivering zero maintenance and unshakeable accuracy.
Live Telemetry & Cloud Ledger
Automated cellular telemetry uploads flow totals every 15 minutes, ensuring your CGWA water balance audit is always up to date.
Zero Pressure Drop
The full-bore sensor pipe does not reduce pipeline diameter or insert obstructions, saving thousands of rupees in pump electricity bills.
Submersible IP68 Coil Hermeticity
Potted in solid polyurethane resin, the sensor coils withstand submerged flooding in outdoor valve pits during heavy monsoon weather.
Self-Cleaning Electrodes
High-frequency alternating field excitation eliminates electrochemical polarization and resists grease or slurry coating.
Product Configuration
Select the Mag Meter Setup for Your Pipeline
Select your pipe diameter, converter enclosure, and power supply for customized sizing:
Pipe Diameter
Converter Mounting
Power Source
Liner Material
Factory Calibrated & Certified
Each Bulfro electromagnetic flow meter is individually wet-calibrated on our gravitational flow test rig and supplied with a NABL-traceable calibration certificate.
Frequently Asked Questions
Frequently Asked Questions
Find direct answers to common questions regarding electromagnetic flow meters, pipe sizing, installation, and CGWA compliance.
Yes. As long as the water has an electrical conductivity of at least 5 µS/cm (which all groundwater, municipal tap water, raw lake water, and industrial process water easily have), the mag meter will measure with full ±0.5% precision. Only completely demineralized (DM) or pure RO permeate water requires an ultrasonic flow meter.
Yes. Bulfro’s electromagnetic meters are engineered specifically to comply with Central Ground Water Authority (CGWA) NOC conditions. They include tamper-resistant enclosures, non-resettable totalisers, internal battery backups, and automated 4G telemetry uploading to cloud regulatory servers.
To ensure uniform fluid velocity, electromagnetic meters require 5 times the pipe diameter (5D) of straight undisturbed pipe upstream, and 2 times the pipe diameter (2D) downstream from the flow sensor.
Yes. The remote sensor version comes with an IP68 hermetically potted body that operates continuously under up to 10 meters of water. The electronic display converter is mounted outside the pit on an above-ground pole or control room wall.
For remote pipeline sites without electrical power, our battery-operated model uses high-energy internal lithium-thionyl chloride battery packs designed for 5 to 10 years of autonomous operation at a 15-minute telemetry upload rate.
Yes. Every Bulfro flow meter includes isolated 4–20 mA analogue output, pulse output, and standard RS-485 Modbus RTU communication, allowing direct integration into Siemens, Schneider, Rockwell, or ABB automation architectures.
Upgrade Your Pipelines with Calibrated Electromagnetic Precision
Stop water loss and regulatory non-compliance before audits begin. Share your pipe diameter, expected flow range, and fluid characteristics with Bulfro’s flow metering specialists for a custom-sized proposal.