Brand: ABB

ABB AquaMaster4 FEW400 Electromagnetic Flowmeter

Name: ABB AquaMaster4 FEW400 Electromagnetic Flowmeter – Manual
Brand: ABB

Description

Overview

The ABB AquaMaster4 FEW400 electromagnetic flowmeter is 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. The instrument is purpose-built for the reality of water network monitoring, where most metering points across a distribution network have no mains power available, and a meter that depends on an external power feed simply cannot be deployed at the majority of locations a utility actually needs to monitor.

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.

Seven Star LLC supplies the FEW400 to water utilities and engineering consultancies across Oman and the GCC, helping district metering area (DMA) projects deploy flow and pressure monitoring at boundary points that previously had no practical power option. The combination of leak detection, pressure monitoring, and long-term data logging in a single battery-powered instrument allows a utility to establish a new DMA monitoring point without trenching in mains power or relying on a nearby structure for electricity, which is often the single largest cost and schedule driver in expanding a network monitoring program across Oman’s municipal and regional water networks.

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.

Choosing the Right FEW400 Configuration

Specifying a water network meter means balancing hydraulic, power and communications requirements at each site. Before an enquiry is placed, utilities and consultants should confirm:

Pipe size and style: full bore, reduced bore or probe insertion, based on the flow profile and the available straight pipe run.
Power source: battery, solar, wind or mains, depending on what is available at the chamber.
Integration: pulse/alarm outputs, RS485 Modbus RTU or the AMR output, and whether pressure measurement is required at the same point.
Flange standard and mounting: integral or remote transmitter, with the flange standard of the existing pipework.

Installation and Commissioning

Install the sensor so the pipe remains full at all times, observing the upstream and downstream straight-length recommendations in the ABB documentation. In below-ground chambers, a remote-mounted transmitter kept above flood level simplifies access and improves communication range. After installation, use the Velox Interface app to check configuration, logging interval and alarm settings, and confirm the zero with the line full and flow stopped where the process allows.

Maintenance and Troubleshooting

Electromagnetic meters have no moving parts, so maintenance focuses on batteries, seals and data. Monitor the reported battery status, keep cable glands and enclosure seals intact in flooded chambers, and review logged data for sudden steps that may indicate air in the pipe, electrode coating or a grounding issue.

Water Network Applications in Oman and the GCC

Distribution networks across the region are extending district metered areas to reduce non-revenue water, and many boundary points are in remote locations without mains power. A battery or solar powered ABB AquaMaster4 FEW400 electromagnetic flowmeter with built-in pressure logging suits these sites well. Seven Star LLC supplies the FEW400 against your project data, including pipe schedules and communication requirements, and supports consultants during submittal review.

Request a Quote for ABB AquaMaster4 FEW400 Electromagnetic Flowmeter

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 lead time for your project. | Inquiry Form

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About brand

ABB is the Swiss-Swedish engineering group for electrification and automation: low voltage drives, motors, circuit breakers and motor control, process instruments and analysers, control systems and robots. It was formed on 5 January 1988 by the merger of two older companies. ASEA was founded in Västerås, Sweden, in 1883 by Ludvig Fredholm to make electric lighting and generators. BBC Brown Boveri was founded in Baden near Zurich in 1891 by Charles E. L. Brown and Walter Boveri. ABB Ltd is incorporated in Switzerland, headquartered in Zurich and listed on the SIX Swiss Exchange and Nasdaq Stockholm.

ABB company profile

Formed	5 January 1988, by the merger of ASEA (Sweden) and BBC Brown Boveri (Switzerland), each holding 50%
ASEA	Founded 1883 in Västerås, Sweden, by Ludvig Fredholm; first products electric lighting and generators
Brown, Boveri & Cie	Founded 1891 in Baden, Switzerland, by Charles E. L. Brown and Walter Boveri
Headquarters	Zurich, Switzerland; ABB Ltd became the group holding company in 1999
Ownership	Public company listed on SIX Swiss Exchange and Nasdaq Stockholm
Brands in the group	Baldor (US motors, acquired 2011), B&R (machine automation, acquired 2017), K-TEK level instruments, Endura and Navigator analysers, SACE breakers
Product families	Low and medium voltage drives (ACS series), motors, SACE Tmax and Emax breakers, contactors and soft starters, flow, pressure, temperature and level instruments, liquid and gas analysers, Contrac actuators, AC500 PLCs, Ability System 800xA and S800 I/O, protection relays, robots

Milestones

1883: ASEA is founded in Västerås, Sweden.
1891: Brown, Boveri & Cie is founded in Baden, Switzerland.
1987–1988: The merger is announced on 10 August 1987; ABB Asea Brown Boveri starts operating on 5 January 1988.
1999: ABB Ltd, incorporated in Switzerland, becomes the single holding company of the group.
2011 and 2017: Baldor Electric and B&R join ABB.
2020: ABB sells its power grids business to Hitachi, focusing on electrification, motion, process and machine automation.

Choosing an ABB drive

ABB's ACS drive codes are easy to read once you know the pattern. In ACS580-01-046A-4, "ACS580" is the drive family, "01" means a wall-mounted single drive, "046A" is the rated output current (about 46 A) and "-4" means a 380–480 V supply. The family is chosen by application: ACS355 for compact machinery, ACS310 for simple pumps and fans, ACS580 as the general-purpose drive, ACQ580 for water and wastewater with pump functions such as pipe fill and dry-run protection, and ACS880 for heavy industrial duty with direct torque control. Size the drive on the motor's full-load current, not only its kW rating, and allow derating for the high ambient temperatures common in Gulf electrical rooms.

Where ABB products are used

In Oman and the GCC, ABB drives and motors run pumps, fans and compressors in water and wastewater plants, district cooling, oil and gas and industry. ABB flowmeters, level instruments and analysers are used in water utilities, power and desalination plants and refineries, and SACE breakers protect switchboards in buildings and plants.

ABB products we list

Family	Examples
AC drives	ACS580, ACS580-01-046A-4, ACQ580, ACS355, ACS310, ACS880-01, FEN-31 encoder module
Breakers, motor control and protection	SACE Tmax XT, XT3N 250, SACE Emax 2, AF09 contactor, PSR soft starter, REM615 relay
Flow measurement	ProcessMaster FEP300, AquaMaster4, CoriolisMaster FCB430, VortexMaster FSV430, SwirlMaster FSS430, OriMaster FPD500
Pressure, temperature and level	266DRH, 267CS multivariable, TTH300, K-TEK AT100, LMT200, MT5000 GWR, KM26 gauge
Analysers	Endura AZ20, AK100 hydrogen purity, Navigator AW641 silica, AW402 chlorine, AWT210
Control systems and actuators	AC500, AC500-S, S800 AI810, AC 800F SA 811F, Contrac RSD50, Contrac RHD4000

Ordering ABB products: what we need

Send the full type code from the nameplate (for example ACS580-01-046A-4 or 266DSH...) and, for spare parts, the ABB ID number (such as 3BSE008508R1 or 1SBL176001R3010). For drives, add the motor power and current and any option codes (+...). For instruments, send the complete order code, which sets range, materials and approvals. Baldor motors are listed on their own brand page.

Facts checked against ABB company filings and published histories of ASEA and Brown, Boveri & Cie, October 2026.

Frequently Asked Questions

How is the AquaMaster4 FEW400 powered?

It runs on 3.6 V lithium thionyl chloride D-cells (battery life up to 10.5 years on DN 40-80), or optionally mains 95-240 V AC, solar or wind power, making it suitable for sites without external power.

What accuracy does the FEW400 provide?

OIML R49:2013 metering performance: +/- 0.2% of rate for Class 1 when mains powered, or +/- 0.5% / +/- 0.4% for Class 2 on battery power.

Does the FEW400 log data?

Yes. The integral logger stores flow and pressure data with 45,871 records (31 days at 1-minute intervals) plus 8 years of totals, retrieved as time-stamped CSV via the ABB Velox Interface app.

What communication interfaces does the FEW400 offer?

RS485 Modbus RTU (9600/19200 baud), pulse/alarm outputs and 3-wire Sensus-compatible AMR output for SCADA, telemetry and billing systems.

What sizes and flanges are available?

Full bore DN 40-600 with reduced bore and probe versions to DN 2400, with flanges to ASME, AWWA, ISO 7005/EN 1092-1, DIN, AS 4087, AS 2129 and JIS standards.

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