Company Profile

Water Flow Meter 12 Inch: Municipal Main Line Flanged Volumetric Sensors

Quick Answer

For a 12-inch municipal water main line, a flanged volumetric flow sensor like the Silver Instruments MFE600 electromagnetic flow meter delivers accurate billing-grade measurement with no moving parts. It handles flow rates up to 2,200 m3/h at pressures up to 16 bar, with 4-20 mA HART and Modbus outputs ready for SCADA. Send us your DN300 pipe spec, flow range, and water quality to get a same-day quote.

Matching Sensor to DN300 Municipal Applications

Municipal water networks in cities like Ho Chi Minh City, Nairobi, or Manila often run 12-inch (DN300) ductile iron or steel mains. Billing disputes between water authorities and bulk consumers require a volumetric sensor that provides custody-transfer accuracy. Silver Instruments supplies flanged electromagnetic flow meters specifically for these large line sizes. The meter body is short, fits between two ANSI 150 or PN10/16 flanges, and installs with standard gaskets.

One common mistake is using a turbine or mechanical meter that jams when sand or pipe scale passes through. We have seen this on customer sites many times. The MFE600 has a full-bore design with no obstructions, so debris passes straight through. The liner options in PTFE or hard rubber ensure long life with potable water, raw water, or treated effluent. Accuracy holds at ±0.5% of reading from 0.3 m/s to 10 m/s, which covers the typical night time minimum flow and peak hour demand.

Outputs and Integration into Existing SCADA

Most municipal pumping stations already have a PLC or RTU. The flanged volumetric sensor outputs 4-20 mA HART as standard, and we include pulse and Modbus RS485 at no extra cost. If you need wireless connectivity, our technical team can add a NB-IoT or 4G DTU module pre-wired into the terminal box. A water authority in Kenya recently ordered ten of these 12-inch meters with solar-powered data loggers for a rural distribution project. The remote monitoring cut their NRW (non-revenue water) by 18% in the first quarter.

The converter display shows instantaneous flow rate, positive and negative totalizers, and diagnostics. You can set empty pipe detection and alarms for low flow or over-range events. In practice, the alarm relay often connects to a local buzzer in the treatment plant so operators hear an alert even if the SCADA screen is unattended.

Pressure, Temperature, and Installation Limits

The sensor body is rated PN16 (16 bar) as standard, with an optional PN25 upon request. Fluid temperature limits are 0 to 80 °C for the rubber liner and -20 to 150 °C for PTFE. Grounding rings are included for plastic or lined pipes, otherwise the meter grounds via the metal flanges. The inlet straight run requirement is 5D upstream and 2D downstream, but if you have a partially open gate valve right before the meter you might need 10D. Our application note for DN300 installations explains this in detail; ask for document EM-300-RUN.

How to Request a Quote for a 12-Inch Water Flow Meter

We ship to Australia, Southeast Asia, Middle East, Africa, and Latin America from our factory in China. Most DN300 meters with standard rubber liner and 316L electrodes leave within 7 working days. To get a firm price, send us the following data:

Pipe outer diameter and wall thickness (or DN and schedule)
Water type (potable, raw, wastewater)
Required flow range in m3/h
Pressure in bar and temperature in °C
Output signals and communication protocol

You can reach us via email at [email protected], call +86-25-68650347, or message on WhatsApp at +86-25-52155837. For quick technical sketches, our WeChat is +86 15365082610. We reply within business hours (UTC+8) and usually within 4 hours.

Frequently Asked Questions

Q: Can this 12-inch volumetric sensor work wi