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Endress Hauser Promag 50 Flow Meter Specifications: Standard Electromagnetic Meter for Water
Quick Answer: The Promag 50 standard electromagnetic meter for water covers DN25 to DN2000 lines and needs at least 5 µS/cm fluid conductivity. Silver Instruments supplies a comparable electromagnetic water flow meter with 4-20 mA HART output, rubber or PTFE liners, and lower lead times for Asia and Oceania. Send your flow range, pipe size, pressure and temperature for a quote.
What Are the Core Promag 50 Specifications for Water?
The Promag 50 standard electromagnetic meter is common in water treatment plants, pump stations and utility networks. Accuracy is ±0.5 percent of reading above 0.5 m/s velocity. The empty pipe detection option helps avoid false totals when a line drains. Process temperature for rubber liners usually stays between minus 20 °C and plus 80 °C. PTFE liners can go higher, but most water jobs stay below 60 °C.
Minimum conductivity matters. Most municipal water has 100 to 800 µS/cm, so the Promag 50 works without trouble. Reverse osmosis permeate or demineralized water can drop below 5 µS/cm. In those cases electromagnetic measurement is not reliable and we often suggest an ultrasonic flow meter instead.
What Line Sizes and Process Connections Does the Promag 50 Cover?
The Promag 50 standard water meter typically starts at DN25 and goes up to DN2000. Common process connections are wafer, flanged EN 1092-1, ASME B16.5, or JIS. For small lines under DN25, Silver Instruments supplies a DN15 electromagnetic meter for dosing and pilot plants. Promag 50 does not always cover that small size in the water product range.
In practice, many water plants in Vietnam, Indonesia and the Philippines run DN100 to DN400 meters on raw water intake, backwash lines and distribution headers. The flange pressure rating is normally PN16 for water. High pressure stations with PN40 are available, but rare in municipal water.
What Outputs and Power Options Are Standard?
The standard Promag 50 transmitter offers 4-20 mA HART output, pulse output and a status contact. Power supply can be 85 to 260 V AC or 20 to 30 V DC. The local display shows flow rate, totalizer and diagnostic codes. Most plants wire 4-20 mA HART into a PLC or SCADA system. The pulse output works well for batching or chemical dosing control.
Here is the thing. Most engineers skip grounding ring details during selection. In plastic or internally coated pipe, grounding rings or grounding electrodes are needed. We have seen this on customer sites many times where a new water meter reads zero because the installation missed grounding.
Can Silver Instruments Match the Promag 50 for Water Service?
Silver Instruments supplies a standard electromagnetic flow meter for water with similar footprint and wiring. It
Last year a customer in Vietnam replaced a damaged Promag 50 on a DN150 raw water intake. We supplied a rubber lined electromagnetic meter with the same 4-20 mA HART mapping. The plant electrician completed the swap in one shift. No PLC program change was needed.
For a water flow meter quote, send Silver Instruments your pipe size, process connection, flow range, pressure, temperature, and water conductivity. Tel: +86-135-1213-1526. WhatsApp: 86-135-12131526. WeChat: +86 13512131526.
What Affects Water Flow Meter Price and Delivery?
Water meter price depends on line size, liner material, flange rating and output options. A DN100 rubber lined electromagnetic meter with 4-20 mA HART costs less than a PTFE lined meter with Modbus. Lead time for standard DN15 to DN500 water meters is usually 7 to 15 days. Large DN600 to DN2000 units may take 4 to 6 weeks. We ship from China to Southeast Asia, Oceania, Latin America, Africa and the Middle East by air or sea.
The same transmitter platform also covers chemical dosing, food and beverage CIP lines, and marine cooling water. If your process has low conductivity or very low flow, we can check whether an ultrasonic or Coriolis meter fits better.
FAQ
Question: What is the minimum conductivity for a Promag 50 water meter?
The Promag 50 and the Silver Instruments equivalent both need at least 5 µS/cm. Most raw water and drinking water are above this level. Demineralized water needs an ultrasonic or Coriolis meter.
Question: Can Silver Instruments replace a Promag 50 without changing the pipe flanges?
In many DN25 to DN500 cases yes. The face to face length and flange pattern match standard EN or ASME dimensions. Send the existing flange standard and face to face dimension to confirm.
Question: What outputs are available on the Silver Instruments water meter?
Standard output is 4-20 mA HART with pulse. RS485 Modbus RTU is optional. The Promag 50 wiring usually maps over without extra work.
Question: What is the accuracy of the Silver Instruments electromagnetic water meter?
Accuracy is ±0.5 percent of reading above 0.5 m/s. For low flow below 0.3 m/s, we recommend a smaller line size or a different meter type.
Question: How do I get a water flow meter price from Silver Instruments?
Send your pipe size, process connection, flow range, pressure, temperature and conductivity to Tel: +86-135-1213-1526 or WhatsApp: 86-135-12131526. We reply within one business day.
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