Electromagnetic Flow Transmitter Experiment

Virtual Experiment Setup

Standard View

Experiment Controls

PUMP & SYSTEM OPERATION

TRANSMITTER VIEW MODE

FLOW CONTROL VALVE (0 - 100%) 100%

LIVE INSTRUMENTATION READINGS

Flow Rate (Q) 0.0 L/min

Output Current (I) 4.00 mA

Fluid Velocity (v) 0.00 m/s

Induced EMF (e) 0.00 mV

Signal Loop: Active 4–20 mA Current Loop Telemetry

Real-Time Calibration Curve: Flow Rate (L/min) vs Output Current (mA)

Linear 4–20 mA Current Loop Calibration according to NAMUR NE43 standard

Experimental Observation Log

Record measured flow rate, velocity, generated voltage, and output current

S.No.	Valve Opening (%)	Flow Rate (L/min)	Fluid Velocity (m/s)	Induced EMF (mV)	Output Current (mA)	Flow Status & Observation

GOVERNING PRINCIPLE

Faraday's Law of Electromagnetic Induction

When a conductive liquid flows through a magnetic field perpendicular to the flow direction, a voltage is induced proportional to the mean velocity of the liquid.

Electromagnetic Flow Sensing

Induced Signal Voltage: Proportional to fluid flow velocity
Magnetic Coil Assembly: Establishes constant perpendicular magnetic field
Sensing Electrodes: Stainless steel flush-mounted pickup sensors
Meter Bore: Non-magnetic lined flow passage

Volumetric Flow Rate Linear Relationship

Because the internal pipe cross-sectional area remains fixed, fluid velocity directly corresponds to volumetric flow rate:

Induced Signal Potential ∝ Volumetric Flow Rate

This demonstrates that the generated signal is strictly linear with volumetric flow rate, regardless of fluid density, temperature, viscosity, or pressure!

PROCESS FLOW

Signal Flow Architecture

Water Flow Initiated

Pump forces conductive liquid (> 5 µS/cm conductivity) through non-magnetic flow tube.

Magnetic Field Generated

Electromagnet coils powered by pulsed DC produce field perpendicular to fluid path.

EMF Induction & Sensing

Moving ions separate, inducing potential detected across flush Electrodes E1, E2.

Signal Processing & Telemetry

Signal converter amplifies microvolt signal into a standard 4–20 mA current loop output.

Primary Mechanical Components

Flow Tube: Non-magnetic stainless steel spool piece with insulating liner (PTFE / Hard Rubber).
Sensing Electrodes: Hastelloy C / Platinum electrodes in direct contact with liquid.
Magnetic Coils: Dual electromagnetic coils mounted top/bottom generating uniform magnetic flux.

Industrial Applications & Advantages

No Moving Parts: Zero pressure loss, zero obstruction, low maintenance.
Slurry & Corrosive Liquids: Ideal for wastewater treatment, acid dosing, paper pulp, mining slurries, food & dairy.
Linear Standard Output: Direct compatibility with PLCs, DCS, and SCADA via 4–20 mA current loops.

PrayogSetu

Electromagnetic Flow Transmitter (Faraday's Law)

Virtual Experiment Setup

Experiment Controls

LIVE INSTRUMENTATION READINGS

Primary Mechanical Components

Industrial Applications & Advantages