Name: Proline Prosonic Flow W 400 / 9W4B
Brand: Endress+Hauser
Availability: InStock

Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Reliable, flexible, zero maintenance – noninvasive flow measurement, consistently accurate, even in limited spaces

Picture of ultrasonic flowmeter Proline Prosonic Flow W 400 (9W4B)

Picture of ultrasonic flowmeter Proline Prosonic Flow W 400 in limited space

Picture of ultrasonic flowmeter Proline Prosonic Flow W 400 on a DN 2000 pipe

Ultrasonic clamp-on flowmeter Proline Prosonic Flow W 400 – noninvasive and easy to install – no process interruption – maintenance-free operation

When space is limited: Ultrasonic clamp-on flowmeter with FlowDC function for consistently high performance even at only 2 x DN inlet runs

Ultrasonic flow measurement in an energy plant – maintenance-free clamp-on sensors on a DN 2000 pipe

Consistently high measurement performance in spite of disturbed flow profile – Prosonic Flow W 400 with FlowDC

How to install an Endress+Hauser ultraonic clamp-on flowmeter

How FlowDC function reduces inlet runs to a minimum

Straightforward application of FlowDC in practice

The ultrasonic flow measuring principle

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Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Reliable, flexible, zero maintenance – noninvasive flow measurement, consistently accurate, even in limited spaces

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Benefits

Flexible mounting – FlowDC reduces inlet runs to a minimum
Reliable measurement performance – proven sensors in combination with maintenance-free mounting system deliver long-term stable signals
Low capital investment – cost-effectiveness increases with the pipe diameter (up to DN 4000/160")
User-friendly operation – the web server offers full remote access, while the device’s display offers convenient on-site interaction
Transparent process insights – Heartbeat Technology with its integrated diagnostics, verification and monitoring functions enable compliance and process safety at all times

Integrated technologies

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Product Support Product documentation, troubleshooting articles, device details and more.

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Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

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Fundamental selection Meet your basic measurement needs

Lean selection Handle your core processes easily

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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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24/7 customer portal

Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

Technology

Smart instrumentation through Heartbeat Technology

You want to increase plant performance and reduce costs? Our smart instrumentation portfolio with Heartbeat Technology offers in-depth device insight for more cost-efficiency and operational safety.

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Selection of compatible products

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RMA42 process transmitter with control unit

4-wire process transmitter with control unit as DIN rail device with up to two universal sensor inputs and optional SIL approval

EngyCal RH33 BTU meter

Calibratable BTU meter for one measuring point with one pulse/analog input for flow and two RTD/analog inputs for temperature/pressure

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HAW569 surge protective device

Surge protective device for installation in the field device for power supply and communication signals optional with SIL and Ex approval

Spare parts and accessories

Electronic

Electronics Prosonic Flow 400

Electronic

Order code XPD0092-

Drawing number 30

Electronic

Electronics Prosonic Flow 400

Electronic

Order code XPD0092-

Drawing number 30

Display

Display module, 4-wire, 400

Display

Order code XPD0017-

Drawing number 50

Terminal module

Kit connection terminals, 400

Terminal module

Order code 71228789

Drawing number 45

Spare parts & accessories

Reliable flow measurement despite difficult conditions

Schluchseewerk AG wanted to record and optimize the efficiency of its turbines at the pumped storage plant in Wehr. Endress+Hauser offers the optimum solution with its ultrasonic clamp-on flowmeter.

Read the full story

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Proline Prosonic Flow W 400

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CAD Drawings

Configuration support

Spare parts and accessories

Electronic

Electronics Prosonic Flow 400

Electronic

Order code XPD0092-

Drawing number 30

Electronic

Electronics Prosonic Flow 400

Electronic

Order code XPD0092-

Drawing number 30

Display

Display module, 4-wire, 400

Display

Order code XPD0017-

Drawing number 50

Terminal module

Kit connection terminals, 400

Terminal module

Order code 71228789

Drawing number 45

Spare parts & accessories

Selection of compatible products

RMA42 process transmitter with control unit

4-wire process transmitter with control unit as DIN rail device with up to two universal sensor inputs and optional SIL approval

EngyCal RH33 BTU meter

Calibratable BTU meter for one measuring point with one pulse/analog input for flow and two RTD/analog inputs for temperature/pressure

Memograph M RSG45 data manager

Advanced data and energy manager with up to 20 analog/HART® inputs and 14 digital inputs

Proline Promag W 400 electromagnetic flowmeter

Versatile standard flowmeter for the water and wastewater industry

HAW569 surge protective device

Surge protective device for installation in the field device for power supply and communication signals optional with SIL and Ex approval

Max. measurement error	Volume flow: ±3% o.r. for DN15 ±2% o.r. for DN25 to 200 ±2% o.r. above DN200
Measuring range	0 to 15 m/s (0 to 50 ft/s)
Medium temperature range	–40 to +130 °C (–40 to +266 °F)
Max. process pressure	N/A
Measuring principle	Ultrasonic flow
Product headline	Clamp-on meter with Heartbeat Technology and web server for the water and wastewater industry. Short inlet run thanks to FlowDC. Bidirectional measurement for water and wastewater as well as process water and hydropower plants.
Sensor features	Low capital investment – cost-effectiveness increases with pipe diameter (up to DN 2000/80"). Long-term stable signal – maintenance-free permanent mounting from outside with coupling pads. Reliable measurement on various pipe materials – sensor for GRP and plastic pipes available. Mounting without process interruption. Wide nominal diameter range: DN 15 to 4000 (½ to 160"). Medium temperature up to +130 °C (+266 °F).
Transmitter features	Safe operation – no need to open the device due to display with touch control, background lighting. Full remote access – web server. Integrated diagnostics, verification and monitoring – Heartbeat Technology. Transmitter housing made of durable polycarbonate or aluminium. Remote version for wall mounting. Integrated data logger: measured values monitoring.
Nominal diameter range	DN15 to 4000 (1/2 to 160")
Sensor materials	Clamp on system: Sensor holder 1.4301 (304), 1.4404 (316L) Sensor housing 1.4301 (304), 1.4404 (316L) Strapping bands 1.4301 (304), 1.4404 (316L)
Measured variables	Volume flow, Flow velocity, Sound velocity
Ambient temperature range	Sensor DN 15 to 65: -40 to 130°C Sensor DN 50 to 4000: -40 to 130°C
Sensor housing material	N/A
Transmitter housing material	Wall-mounted housing Polycarbonat; AlSi10Mg, coated
Degree of protection	Transmitter: IP66/67, Type 4X enclosure Sensor: IP66/67, Type 4X enclosure, IP68, Type 6P enclosure (optional)
Display/Operation	4‐line backlit display with touch control (operation from outside) Configuration via local display, web browser and operating tools possible
Outputs	3 ouputs: 4‐20 mA/4‐20 mA HART (active) Pulse/frequency/switch output (passive) Pulse/frequency/switch output (passive) Modbus RS485
Inputs	Status input
Digital communication	HART
Power supply	AC 100 to 240 V / AC/DC 24 V
Approvals	cCSAus
Other approvals and certificates	Other approvals and certificates
Product safety	CE, C-tick marking, EAC-marking
Metrological approvals and certificates	Flowmeter verification for all frequencies except 0.3 MHz, reference line size: 5 MHz DN 50, all other frequencies DN 100 Verification performed on accredited calibration facilities (acc. to ISO/IEC 17025) Heartbeat Technology complies with the requirements for measurement traceability according to ISO 9001:2015 – Section 7.1.5.2 a
Marine approvals and certificates	Marine approvals and certificates

Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Product information

Selection of compatible products

Spare parts and accessories

Related content

Reliable flow measurement despite difficult conditions

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

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Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Proline Prosonic Flow W 400 ultrasonic clamp-on flowmeter

Product information

Selection of compatible products

Spare parts and accessories

Related content

Reliable flow measurement despite difficult conditions

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

Products & Services

Industries

Support

Company

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