Typical use of electromagnetic flowmeters

1. Municipal Water Supply Monitoring

Scenario: A city water supply company needs to monitor real-time water flow in pipelines to ensure supply balance and leak detection.

Application:

Install an electromagnetic flowmeter (e.g., DN300 caliber) in the main pipeline to measure flow velocity and cumulative water volume.

Upload data to a cloud platform via a 4G module for remote monitoring.

Advantages:

No moving mechanical parts, resistant to dirt, and highly stable for long-term use.

Measurement is unaffected by water quality (e.g., impurities, turbidity).

 

2. Corrosive Liquid Measurement in the Chemical Industry

Scenario: A chemical plant needs to accurately measure sulfuric acid flow in pipelines, where the medium is highly corrosive.

Application:

Use an electromagnetic flowmeter (e.g., DN80 caliber) with PTFE lining and Hastelloy electrodes.

Equip with an explosion-proof housing for installation in hazardous areas.

Advantages:

Strong corrosion resistance, suitable for strong acids/alkalis.

High accuracy (±0.5%), ensuring safe production ratios.

 

3. Sludge Flow Measurement in Wastewater Treatment Plants

Scenario: Monitoring return sludge flow during wastewater treatment to optimize efficiency.

Application:

Use a large-caliber (DN500) electromagnetic flowmeter with wear-resistant lining (e.g., rubber or polyurethane).

Apply low-frequency excitation technology to reduce interference from solid particles.

Advantages:

Suitable for high-solid-content, viscous media, preventing clogging.

No straight-pipe requirement, ideal for space-constrained installations.

 

4. Hygienic Applications in the Food Industry

Scenario: A dairy plant needs to measure milk flow in pipelines while complying with hygiene standards.

Application:

Use a sanitary electromagnetic flowmeter (DN50) with 316L stainless steel electrodes and a quick-release design.

Compatible with CIP (clean-in-place) systems, featuring a dead-space-free structure.

Advantages:

Complies with FDA/GMP certifications, preventing medium contamination.

Fast response time, suitable for batch control.

 

5. Slurry Flow Monitoring in Mining Operations

Scenario: A mineral processing plant needs real-time monitoring of slurry flow (containing high-density particles).

Application:

Use a high-pressure electromagnetic flowmeter (DN200) with ultra-wear-resistant ceramic lining and electrodes equipped with scrapers.

Install on inclined pipelines to avoid sedimentation.

Advantages:

Wear-resistant, extending service life.

Stable signal output, minimizing the impact of slurry conductivity fluctuations.

 

6. Circulating Cooling Water Measurement in the Energy Sector

Scenario: A power plant needs to monitor energy consumption in cooling water systems.

Application:

Use an insertion-type electromagnetic flowmeter (DN400) that can be installed without stopping production.

Equip with temperature/pressure compensation to calculate thermal energy consumption.

Advantages:

Low-cost measurement for large pipes, easy maintenance.

Low-power design, suitable for long-term operation.

 

Common Issues and Precautions

Installation Requirements:

Ensure full-pipe conditions to avoid air bubble interference (electrodes should face sideways in horizontal installations).

Proper grounding to prevent electrical noise (especially critical for low-flow measurements).

Medium Limitations:

Requires conductivity ≥5 μS/cm (not suitable for pure water or oils).

Maintenance:

Regularly check for electrode scaling (alerts can be set via empty-pipe detection).