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3-Inch and 4-Inch PVC Water Processing and Irrigation Flow Meter Digital Specs
Quick Answer
For a 3-inch PVC water line order a DN80 digital electromagnetic flow meter. For a 4-inch PVC irrigation line order a DN100 digital electromagnetic flow meter. The 3-inch model covers 5 to 180 m3/h and the 4-inch model covers 8 to 280 m3/h. Silver Automation Instruments supplies both sizes with 4-20 mA HART, pulse, RS485 Modbus RTU, and a local LCD display.
What These PVC Flow Meters Measure
These digital flow meters measure volumetric flow rate and total flow in water processing and irrigation systems. Common lines include treated water distribution, booster pump stations, drip irrigation headers, filter skids, and pivot irrigation laterals. The 3-inch size fits many small transfer pumps and skid mounted filters. The 4-inch size matches common submersible pump discharge lines in Thailand, Vietnam, Peru, the Philippines, and Kenya.
3-Inch Digital Flow Meter Specifications
The 3-inch PVC flow meter is a DN80 electromagnetic flow meter from Silver Instruments. Flow range is 5 to 180 m3/h under normal velocity. Accuracy is 0.5 percent of reading above 0.3 m/s. Repeatability is 0.2 percent. Process temperature is 0 to 60 °C. Maximum pressure is PN10 standard and PN16 optional. The meter body suits potable water, river water, and light fertilizer solutions. Minimum water conductivity is 20 µS/cm. Digital output includes 4-20 mA HART, RS485 Modbus RTU, and pulse. The local display is a two line LCD with an 8 digit totalizer. Power options are 24 V DC or 85 to 265 V AC.
4-Inch Digital Flow Meter Specifications
The 4-inch PVC flow meter is a DN100 electromagnetic flow meter. Flow range is 8 to 280 m3/h. Accuracy is 0.5 percent of reading and repeatability is 0.2 percent. The same digital board supports 4-20 mA HART, pulse output, and Modbus RTU for SCADA or irrigation controllers. The sensor has an IP68 option for flooded pits. A battery powered version is available for remote fields where AC power is not available.
Installation on PVC Pipe
Because PVC pipe is not conductive, the flow meter should include grounding rings or a grounding electrode. This matters for stable readings on 3-inch and 4-inch plastic lines. In practice, many irrigation sites have tight spaces. Install the meter with 5 pipe diameters of straight run upstream and 3 diamete
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Recommended Models and Ordering Data
Silver Automation Instruments recommends the SIL-EMF-DN80 for 3-inch PVC lines and the SIL-EMF-DN100 for 4-inch PVC lines. Both models come with a plastic compatible liner, pulse output for irrigation controllers, and Modbus RTU for pump station SCADA. Specify the flow range, the pipe outer diameter and wall thickness for glued PVC connections, and the power type. You can also request a battery powered logger version.
Send us your pipe size, pressure in bar, water temperature in °C, flow range in m3/h, and required output. We reply with a quote and a dimensional drawing. Tel: +86-25-68650347, WhatsApp: +86-25-52155837, WeChat: +86 15365082610. You can also review the PVC flow meter section on flow-meter.com.au.
FAQ
Can I use these digital flow meters with battery power for remote irrigation?
Yes. Silver Instruments offers a battery powered version for the 3-inch and 4-inch electromagnetic flow meters. The battery version logs flow data and can send pulse output to a local controller.
Do I need grounding rings on PVC pipe?
Yes. PVC pipe is not conductive. Specify grounding rings or a grounding electrode when you order. Without them the signal can drift or become unstable.
What is the minimum water conductivity for these meters?
The electromagnetic flow meters need at least 20 µS/cm. Most treated water, groundwater, river water, and fertilizer water have enough conductivity. Pure demineralized water may need a different measurement technology.
Can the same flow meter handle both 3-inch and 4-inch pipe?
No. The sensor diameter must match the pipe size for accurate measurement. A DN80 meter fits a 3-inch line. A DN100 meter fits a 4-inch line. Reducers are possible but they add pressure loss.
What is the delivery time for a DN80 or DN100 digital flow meter?
Standard units ship in 7 to 12 working days from Silver Instruments. Custom flange standards or battery options may add a few days. Send your project details for a confirmed schedule.
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