E+H electromagnetic flowmeter in stock

Brand

E+H/Endeshaus (Germany)

Price Range

Negotiable

Product Type

Electromagnetic

Media Classification

Liquid

Origin Category

Imported

Application Fields

Environmental Protection, Chemical Industry, Petroleum, Mining, General Industry

The E+H electromagnetic flowmeter is a new type of flow measurement instrument that developed rapidly in the 1950s and 60s with the advancement of electronic technology. It measures the flow rate of a conductive fluid based on the principle of electromagnetic induction, specifically the electromotive force induced when the fluid passes through an external magnetic field.

E+H Electromagnetic

Flowmeter Product Specifications

Maximum Measurement Error

Standard Volumetric Flow Rate: ±0.5% o.r. ± 1 mm/s (0.04 in/s)

Optional Volumetric Flow Rate: ±0.2% o.r. ± 2 mm/s (0.08 in/s)

Measurement Range

9 dm³/min...110,000 m³/h (2.5 gal/min...700 Mgal/d)

Medium Temperature Range

Hard Rubber Liner: 0...+80 °C (+32...+176 °F)

Polyurethane Liner: –20...+50 °C (–4...+122 °F)

Maximum Process Pressure

PN 40, Cl. 300, 20K

Wetted Parts Material

Liner: Polyurethane, Hard Rubber

Electrode: 1.4435 (316L), Alloy C22 2.4602 (UNS N06022) Alloy, Tantalum

E+H Electromagnetic Flow Meter

Applications

The Promag W is certified for metering transfer and international drinking water standards, making it suitable for a wide range of applications. It is available in both integrated and split-type versions. The Promag D 400 features a powerful transmitter suitable for the water and wastewater industries, significantly reducing time and costs. Meanwhile, Heartbeat Technology ensures reliable measurement and compliance calibration.

E+H Electromagnetic Flow Meter

Features

International Drinking Water Certification

IP68 Protection Rating (6P Housing)

Compliant with MI-001/OIML R49 Standards, Metrological Acceptance Certification Obtained

Transmitter Housing Made of Durable Polycarbonate or Aluminum

Both Integrated and Split Types Use the Same Housing

Integrated Data Logger: Monitors Measured Values

Bidirectional Measurement Principle Eliminates the Need to Consider Measurement Conditions, Including Pressure, Density, Temperature, and Viscosity

Expert in Drinking Water, Public Water, and Industrial/Municipal Wastewater Measurement

E+H Electromagnetic Flow Meter Structure

The E+H electromagnetic flow meter mainly consists of a magnetic circuit system, measuring conduit, electrodes, housing, lining, and transducer.

Magnetic Circuit System: Its function is to generate a uniform DC or AC magnetic field. DC magnetic circuits use magnets, which have the advantages of simple structure and less susceptibility to AC magnetic field interference. However, they easily polarize the electrolyte liquid passing through the measuring tube, causing the positive electrode to be surrounded by negative ions and the negative electrode by positive ions, a phenomenon known as electrode polarization. This increases the internal resistance between the two electrodes, severely affecting the normal operation of the instrument. When the pipe diameter is large, the magnet becomes correspondingly large, bulky, and uneconomical. Therefore, electromagnetic flowmeters generally use alternating magnetic fields, generated by a 50Hz power frequency.

Measuring tube: Its function is to allow the conductive liquid being measured to pass through. To ensure that the magnetic flux is shunted or short-circuited when the magnetic lines of force pass through the measuring tube, the measuring tube must be made of a non-magnetic material with low conductivity, low thermal conductivity, and sufficient mechanical strength. Non-magnetic materials such as stainless steel, fiberglass, high-strength plastics, and aluminum can be used.

Electrodes: Their function is to extract the induced electromotive force signal proportional to the measured quantity. Electrodes are generally made of non-magnetic stainless steel and are required to be flush with the lining to ensure unobstructed fluid flow. Its installation position should ideally be perpendicular to the pipeline to prevent sediment buildup that could affect measurement accuracy.

Shell: Made of ferromagnetic material, it serves as the outer cover for the excitation coil of the distribution system and isolates it from external magnetic field interference.

Liner: A complete electrically insulating lining is present on the inner side of the measuring conduit and the flange sealing surface. It directly contacts the measured liquid and its function is to increase the corrosion resistance of the measuring conduit and prevent short-circuiting of the induced potential by the metal measuring conduit wall. Lining materials are often corrosion-resistant, high-temperature resistant, and wear-resistant polytetrafluoroethylene (PTFE) plastics, ceramics, etc.

Converter: The induced potential signal generated by the liquid flow is very weak and highly susceptible to various interference factors. The converter's function is to amplify and convert the induced potential signal into a unified standard signal while suppressing major interference signals. Its task is to amplify and convert the induced potential signal Ex detected by the electrodes into a unified standard DC signal.

Features:

1. Measurement is unaffected by changes in fluid density, viscosity, temperature, pressure, and conductivity;

2. No pressure loss in the measuring conduit's internal flow components, requiring less straight pipe section. 3. Adaptable to slurry measurement;

4. Appropriately selected sensor lining and electrode materials provide excellent corrosion and wear resistance;

5. The converter employs a novel excitation method, resulting in low power consumption, stable zero point, and high accuracy. Flow range accuracy can reach 150:1;

6. The converter can be integrated with the sensor or used separately;

7. The converter uses a 16-bit high-performance microprocessor, a 2x16 LCD display, convenient parameter setting, and reliable programming;

8. The flow meter is a bidirectional measurement system with three built-in totalizers: forward total, reverse total, and differential total; it can display forward and reverse flow rates and has multiple outputs: current, pulse, digital communication, and HART;

9. The converter uses surface mount technology (SMT) and has self-testing and self-diagnostic functions;

10. Measurement accuracy is unaffected by changes in fluid density, viscosity, temperature, pressure, and conductivity. The sensor's induced voltage signal has a linear relationship with the average flow velocity, resulting in high measurement accuracy. 10. There are no flow obstructions within the measuring pipe, therefore no additional pressure loss; there are no moving parts within the measuring pipe, resulting in an extremely long sensor lifespan.

11. Because the induced voltage signal is formed throughout the entire magnetic field-filled space and is the average value across the pipe cross-section, the required straight pipe section is relatively short, only 5 times the pipe diameter.

12. The converter uses the latest international single-chip microcomputer (MCU) and surface mount technology (SMT), ensuring reliable performance, high accuracy, low power consumption, zero-point stability, and convenient parameter setting. Clicking the Chinese display LCD shows cumulative flow, instantaneous flow, flow velocity, flow percentage, etc.

13. A bidirectional measurement system capable of measuring both forward and reverse flow. Special manufacturing processes and high-quality materials ensure stable product performance over long periods.

E+H Electromagnetic Flowmeter