Insertion Electromagnetic Flowmeter

The insertion-type electromagnetic flowmeter is a velocity-based flow instrument designed based on Faraday's law of electromagnetic induction. At its core is a miniature electromagnetic sensing probe with a diameter of just 24 mm, which is inserted into any closed pipeline ranging from DN100 to DN3000 via a pressurized tapping process. This allows the device to continuously and non-invasively capture the average fluid velocity in real time—without interrupting water flow or requiring flow diversion—and then convert it directly into volumetric flow rate.

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Insertion-type electromagnetic flowmeter

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产品描述

- Commodity name: Insertion Electromagnetic Flowmeter
I. Product Introduction

The insertion-type electromagnetic flowmeter is a velocity-based flow instrument designed based on Faraday's law of electromagnetic induction. At its core is a miniature electromagnetic sensing probe with a diameter of just 24 mm, which is inserted into any closed DN100–DN3000 pipeline via a pressurized tapping process—allowing real-time measurement of the average fluid velocity without interrupting water flow or requiring flow diversion. The instrument features a two-stage architecture consisting of a "sensing probe + converter."

• Sensing probe: Excitation coil, detection electrode, integrated packaging, with IP68-rated submersible protection;

• Converter: Available in integrated (battery-powered) or split-type (AC 220 V / 24 VDC) versions, featuring a built-in low-power multi-protocol remote transmission module supporting 4G/NB-IoT and more.

This design transforms the traditional pipeline-type electromagnetic flowmeter's "full-section excitation" into "point sampling + weighted integration," significantly reducing installation and procurement costs in large-diameter applications while maintaining Class 1 accuracy.

II. Product Specifications

Measure performance

• Caliber range: DN100–DN3000

• Flow velocity range: 0.3–6 m/s

• Accuracy: ±1% R (Standard Model), ±2% R (Economic Model)

• Repeatability: ≤0.25%

• Bidirectional metering: Independent measurement of forward and reverse instantaneous and cumulative flows

Electrical Engineering and Communications

• Power supply options: 3.6 V lithium battery (≥6 years), DC 24 V, AC 220 V, solar hybrid system

• Output interfaces: 4-20 mA, pulse/frequency, HART, RS485, Profibus-DP,

• Far-Reach Communications: NB-IoT, 4G

Structure and Materials

• Probe material: special hygienic-grade insulating sleeve

• Metal components: 304/316 stainless steel, fully welded, rated for 1.6 MPa nominal pressure

• Protection rating: Integrated type IP68 (powered by lithium battery); Split type: Sensor IP68, Converter IP65

• Operating temperature: Medium -30–80 °C; Ambient -30–50 °C

III. Product Features

1. Ultra-fine probe with minimal flow disturbance
A 24 mm diameter streamlined probe, occupying only 0.02% of the pipe’s cross-sectional area, causes virtually no disturbance to the flow field, ensuring reliable detection of ultra-low flow rates as low as 0.01 m/s—even in scenarios involving "large pipes with small flows."
2. Non-stop water operation: Economical and highly efficient
The patented pressurized tapping base combined with an isolation ball valve design allows for online installation, removal, and calibration of components—all while the pipeline network remains fully operational. This single-point operation can be completed in under 30 minutes, reducing construction costs by more than 90%.
3. Full-Condition Adaptive Metering with No Drift
Low-frequency square-wave excitation combined with a dynamic zero-point compensation algorithm effectively suppresses polarization and electrochemical noise. Stable measurement is achieved even at conductivities as low as 20 μS/cm, ensuring accurate readings without false alarms in water containing gas or impurities.
4. Ubiquitous Communication: Plug-and-Play to the Cloud
Equipped with a built-in NB-IoT/4G module, it seamlessly integrates with mainstream SCADA and DMA platforms, enabling data refreshes in as little as minutes.
5. Military-grade protection, 10 years of maintenance-free service
The sensor features an all-stainless steel construction with an IP68-rated submersible design; the converter is fully potted and coated with a three-proof enamel, enabling cold-start capability down to -40°C. Additionally, the battery supports intelligent sleep mode, delivering a battery life of over 8 years under typical usage scenarios.

IV. Application Scenarios – Comprehensive Flow Insights, from Municipal Raw Water to Industrial Recycling

1. Municipal Water Supply

• Precise measurement of "large pipe with small flow" at the raw water intake, treated water from the water plant, and urban main pipelines;

• DMA zone metering + nighttime minimum flow monitoring, enabling intelligent leakage diagnosis and closed-loop management.

2. Industrial Circulation and Cooling

• Power, metallurgy, and chemical industries: Circulating water main pipelines DN1200 and above, installed with zero production downtime;

• Supports 4-20 mA + Profibus-DP connectivity to DCS, enabling online calculation of energy consumption KPIs.