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E&H Mag Flow Meter: Specifications for Electromagnetic Induction Fluid Sensors
Quick Answer: Endress+Hauser (E&H) electromagnetic flow meters cover line sizes from DN15 up to DN2000, provide typical accuracy of 0.2% of reading, and require a minimum fluid conductivity of 5 µS/cm. The sensors come with liners like PTFE, PFA, or hard rubber and electrodes in 316L, Hastelloy, and tantalum. If you need a price for a comparable mag meter with fast delivery, send your operating data to Silver Instruments.
Key Specifications of the E&H Proline Promag Series
E&H builds its Promag sensors for industrial conductive liquids. The line size ranges from DN15 to DN2000, covering most industrial pipes. For small dosing lines, DN15 and DN25 sensors are common. For main water lines in desalination plants, we often see DN1200 or DN1600. Standard pressure ratings include PN10, PN16, PN25, and PN40. Higher pressure flanges up to PN100 are available on request for small bore sizes. Temperature limits depend on the liner. PTFE works from minus 20 to plus 150 degrees Celsius. PFA extends the range to plus 180 degrees Celsius. Hard rubber is suitable for 0 to 80 degrees Celsius and abrasive slurry.
Electrodes contact the fluid directly. Standard electrodes use 316L stainless steel, which handles most water, wastewater, and weak acids. For aggressive chemicals like hydrochloric acid or seawater, you can specify Hastelloy C-22, tantalum, or platinum. The minimum conductivity needed for a standard Promag sensor is 5 microsiemens per centimeter. For demineralized water, E&H offers a sensor design that works down to 20 microsiemens per centimeter. Accuracy under reference conditions is 0.2 percent of the flow rate for liquids. Some models achieve plus or minus 0.1 percent with special calibration. Repeatability is 0.1 percent.
Output options on the transmitter include 4 to 20 milliamp HART, Profibus DP, Profibus PA, Modbus RS485, and EtherNet/IP. The unit can be powered with 24 volts DC or 100 to 230 volts AC. Hazardous area approvals like ATEX Zone 1, IECEx, and FM are available. A paint manufacturer in Thailand chose the Promag P with a PFA liner and Hastelloy electrodes to measure solvent flow at 30 degrees Celsius. That configuration gave them chemical resistance and a clean signal.
Choosing a Sensor for Your Application
The right sensor starts with the pipe size, fluid, and process parameters. In practice, most engineers skip the liner selection step and just copy an existing spec. But if your fluid temperature exceeds 150 degrees Celsius, you need PFA. If you handle abrasive mining slurry, hard rubber or EPDM liners with tungsten carbide electrodes are worth evaluating. Because E&H delivers a broad portfolio, lead times for exotic liners can stretch beyond 12 weeks in some regions. We have seen this on customer sites in the Middle East where a DN150 Promag W with PTFE liner took 14 weeks.
If you are comparing specifications or need a competitive offer with shorter delivery, Silver Automation Instruments manufactures electromagnetic flow meters from DN10 to DN3000. Our factory stocks common liners (PTFE, PFA, neoprene) and electrodes (316L, Hastelloy, titanium). We
Last year a customer in Vietnam needed a replacement for an E&H Promag W DN200 on a cooling water line. They sent us the fluid details and received a Silver Instruments mag meter with identical liner and electrode materials. The unit was installed within five weeks. This kind of cross reference is standard for us because we maintain a large electrode and liner inventory.
FAQ: Common Questions About E&H Mag Flow Meter Specifications
What is the minimum conductivity for an E&H mag meter?
Standard Promag sensors measure liquids with conductivity as low as 5 microsiemens per centimeter. For ultrapure water with conductivity below 5 microsiemens per centimeter, E&H recommends the Promag H with a special transmitter. Most industrial water, chemical, and food applications exceed 20 microsiemens per centimeter, so the standard sensor works fine.
Can I use an E&H mag flow meter for custody transfer?
Yes. E&H offers Promag 100 and Promag 300 models with custody transfer approvals according to OIML R117 and MID. These meters deliver accuracy better than 0.2 percent and are used for billing in oil, gas, and water distribution. For a cost-effective alternative approved for local custody transfer in certain regions, ask Silver Instruments for our MID-compliant series.
Which liner works best for seawater desalination?
PTFE or hard rubber liners combined with Hastelloy C-22 electrodes give excellent resistance in seawater and brine. Avoid 316L electrodes in warm seawater because pitting corrosion can occur within months. We supply seawater mag meters with Hastelloy electrodes as standard for Australian and Middle Eastern projects. Message us on WeChat at +86 13512131526 for a quick seawater meter specification.
How does power supply affect the meter selection?
The transmitter accepts either 24 volts DC for cabinet integration or 100 to 230 volts AC for direct wall mounting. 2-wire loop-powered Promag 10 is also an option if you have a limited power budget. This model reduces cabling cost in remote stations.
What is the pressure rating for large diameter E&H mag meters?
Typical pressure ratings for DN1000 and larger are PN10 or PN16. If you need PN25 at DN1000, E&H can engineer a custom solution with a longer lead time. In our experience, many water treatment plants in Africa and Southeast Asia specify PN10 for DN800 to DN1600 and it meets the system requirements without extra cost. Contact us with your pipe class for a direct replacement estimate.
For a prompt specification review and quotation on an electromagnetic flow meter, email [email protected] or call Tel: +86 25 68650347. Silver Automation Instruments ships to Southeast Asia, Oceania, Latin America, Africa, and the Middle East from our production center. WeChat: +86 13512131526. WhatsApp: +86 25 52155837.
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