E+H Proline Prosonic Flow W 400

Fits water, wastewater, process water, and hydropower flow loops that need clamp-on ultrasonic transit-time measurement on DN15 to DN4000 piping without cutting the pipe or interrupting the process.

Key advantages

Clamp-on ultrasonic — Transit-time measurement without pipe cutting or process interruption.
DN15–DN4000 coverage — Water, wastewater, process water, hydropower focus.
FlowDC + Heartbeat — Disturbance compensation and verification/diagnostics options.
HART / Modbus RS485 — Integrated web server for configuration and diagnostics.

Typical applications

Water and wastewater flow on large or buried lines where hot-tap is undesirable.
Hydropower and process-water clamp-on metering with bidirectional capability.
Retrofits needing Heartbeat verification on Proline Prosonic W 400.

Selection guide

Measuring principle — Clamp-on ultrasonic transit-time.
Pipe size — DN15 to DN4000 coverage.
Bidirectional — Bidirectional flow measurement.
Application — Water, wastewater, process water, hydropower.
Technology — FlowDC and Heartbeat Technology.
Web server — Integrated web server for configuration/diagnostics.
Order code — 9W4B Proline Prosonic Flow W 400.
Installation — Clamp-on sensors; no process interruption / no pipe cutting.
Special features — Heartbeat verification/diagnostics; limited-space installations supported.
Comms — HART (BA02086); Modbus RS485 variant available.
Form — Proline transmitter with clamp-on ultrasonic sensors.
Medium — Liquids (water/wastewater focus).
Approvals — CE.
Documentation — TI01568D technical information; BA02086D HART operating instructions.

Common mistakes

Ordering W 400 (water/wastewater focus) when the duty is general process liquids better covered by P 500 class — confirm medium first.
Leaving pipe size / material / lining blank — clamp-on performance depends on DN15–DN4000 application/sensor pairing.
Ignoring protocol choice — HART vs Modbus RS485 changes transmitter electronics.
Assuming process interruption is required — clamp-on installation needs no pipe cutting .
Skipping Heartbeat verification option when plant QA needs in-situ proof tests.

When to RFQ / what to tell us

Pipe DN, material, lining, medium (water/wastewater/process water), and flow range.
Protocol (HART / Modbus RS485), Heartbeat need, installation space constraints.
Quantity, ship-to, and any regional approvals beyond CE listed here.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	50667
Brand	Endress+Hauser
Model	Proline Prosonic Flow W 400
Product type	clamponultrasonic_flowmeter
Measuring principle	Clamp-on ultrasonic transit-time
Pipe size	DN15 to DN4000 coverage
Bidirectional	Bidirectional flow measurement
Application	Water, wastewater, process water, hydropower
Technology	FlowDC and Heartbeat Technology
Web server	Integrated web server for configuration/diagnostics
Order code	9W4B Proline Prosonic Flow W 400
Installation	Clamp-on sensors; no process interruption / no pipe cutting
Special features	Heartbeat verification/diagnostics; limited-space installations supported
Communication	HART (BA02086); Modbus RS485 variant available
Medium	Liquids (water/wastewater focus)
Approvals	CE
Documentation	TI01568D; BA02086D HART

Documents

FAQ

Q: Do I need to cut the pipe? A: No — clamp-on sensors; no process interruption / no pipe cutting.

Q: W 400 vs P 500? A: W 400 is listed for water/wastewater/process water/hydropower focus; P 500 is the process-liquid clamp-on sibling — confirm medium on the RFQ.

Q: What should I send for a quote? A: DN/material/medium/flow, protocol, Heartbeat, quantity. Compatible with systems using Endress+Hauser Proline Prosonic Flow W 400 — we do not claim authorized-dealer status.