ABB AquaMaster4 FEW400 Electromagnetic Flowmeter
Overview
The ABB AquaMaster4 FEW400 is an electromagnetic flowmeter engineered for water and wastewater networks, offering battery, solar, wind or mains powered operation with no external power required on most installations. It provides flow measurement to OIML R49:2013 metering performance with Class 1 accuracy of +/-0.2% of rate when mains powered, plus pressure measurement, leak detection and an integral data logger, making it a complete flow and pressure monitoring station in one instrument.
Engineering and Design
The FEW400 supports full bore sizes from DN 25 to DN 600 with reduced bore and probe versions covering the full range up to DN 2400 and probe insertion styles, with flanges to ASME, AWWA, ISO 7005/EN 1092-1, DIN, AS 4087, AS 2129 and JIS standards. Battery-powered models run on 3.6 V lithium thionyl chloride D-cells with nominal battery life up to 10.5 years on small sizes (DN 40-80 integral mount, 15-second acquisition) and can be configured locally via the ABB Velox Interface app on any Android smartphone or tablet through NFC.
The instrument provides pulse/alarm outputs, RS485 Modbus RTU (9600/19200 baud) and 3-wire Sensus-compatible AMR output for integration with SCADA, telemetry and billing systems. The integral logger stores flow and pressure data with 45,871 records (31 days at 1-minute intervals) plus 8 years of daily totals, and logger files are retrieved as time-stamped CSV via the Velox app. Options include a mains supply (95-240 V AC), solar or wind renewable power with 48 days of internal backup on small sizes, and pressure transducer input for network pressure monitoring and leak detection.
Key Features
- Battery, solar, wind or mains powered – ideal for sites without external power
- OIML R49:2013 metering performance with Class 1 accuracy of +/- 0.2% (mains powered)
- Battery life up to 10.5 years on DN 40-80 with 15-second acquisition
- Integral flow and pressure logger with 45,871 records plus 8 years of totals
- RS485 Modbus RTU, pulse/alarm outputs and Sensus-compatible AMR output
- Full bore DN 25-600 plus reduced bore and probe versions to DN 2400
- Flanges to ASME, AWWA, ISO 7005/EN 1092-1, DIN, AS 4087, AS 2129 and JIS
- Configuration and data retrieval via ABB Velox Interface app (Android, NFC)
- Pressure transducer input for network pressure monitoring and leak detection
- IP68-rated connectors and 2-pack epoxy coated bodies for buried and chamber use
Applications
Flow and pressure monitoring in potable water distribution networks, district metering areas (DMA), bulk water supply, wastewater, irrigation and industrial water services, including battery-powered remote sites.
Specifications
| Measuring principle | Electromagnetic (Faraday) induction |
| Measurement accuracy | +/- 0.2% of rate (Class 1, mains powered); +/- 0.5% / +/- 0.4% (Class 2) per OIML R49:2013 |
| Bore sizes | Full bore DN 25-600; reduced bore and probe versions to DN 2400 |
| Power options | Battery (3.6 V lithium thionyl chloride D-cells), mains 95-240 V AC (remote), solar or wind 6-32 V DC |
| Battery life | Up to 10.5 years (DN 40-80 integral), 6 years (DN 250-600), 2.5 years (DN 700-2400) at 15 s acquisition |
| Outputs | 2 x pulse/alarm (passive, +35 V @ 20 mA), RS485 Modbus RTU, Sensus 3-wire AMR |
| Logger | 45,871 flow/pressure records, 3,120 totalizer records; CSV export via Velox app |
| Internal backup | 16 days (DN 40-200), 6 days (DN 250-600), 3 days (DN 700-2400) battery models |
| Flange standards | ASME, AWWA, ISO 7005 EN 1092-1, DIN, AS 4087, AS 2129, JIS |
| Body material | SG iron (DN 40-200), carbon steel (DN 250-600), 2-pack epoxy RAL 9002 coating |
| Configuration | ABB Velox Interface app on Android (Oreo or newer) via NFC |
Why Seven Star LLC
Seven Star LLC supplies ABB water and wastewater instrumentation with verified specifications across Oman and the GCC. We help water utilities select the correct bore size, power option and communication interface for district metering and network monitoring projects.
Call To Action
Send your pipe size, network pressure, available power and telemetry requirements to our engineering team for a quotation. Use the Inquiry Form below – we confirm the FEW400 configuration and pricing for your project. | Inquiry Form
ABB is one of the world’s leading technology companies in electrification and automation, recognized for its commitment to innovation, reliability, and energy efficiency. With a history spanning more than a century, ABB delivers high-performance products and systems that help industries operate more intelligently and sustainably.
The company’s expertise covers a wide range of fields including power distribution, process automation, robotics, motion control, and digital solutions for smart manufacturing. ABB’s products are designed to enhance productivity, safety, and operational efficiency while reducing energy consumption and environmental impact.
Seven Star LLC supplies a complete selection of genuine ABB products, including industrial drives, PLCs, contactors, sensors, relays, and automation components, serving clients across oil & gas, energy, marine, and manufacturing sectors.
By combining ABB’s advanced engineering with Seven Star LLC’s trusted sourcing and support, customers gain access to reliable, future-ready industrial solutions built to meet the most demanding standards of modern industries.
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