Proline Prosonic Flow W 400 Ultrasonic Flowmeter


The Proline Prosonic Flow W 400 ultrasonic flowmeter provides reliable liquid flow for a range of liquid measurement applications. The W 400 clamp-on and I 400 insertion units provide comprehensive process monitoring, and they pair with the Proline 400 transmitter to provide a complete flow metering solution.


The flowmeter uses a nonintrusive, clamp-on measurement method, with its ultrasonic sensors mounted directly on a pipe’s exterior. This provides safe measurement of many fluids, independent of their conductivity or other properties.


It is suitable for low or high-pressure applications, on pipes smaller than 1 in. (2.54 cm) in diameter, and up to 160 in. (406.4 cm). It can be used to measure flow, monitor processes, verify previously installed flowmeters, detect leaks in a pipeline, and for other applications.


The flowmeter’s IP68 Type 6P submergence-rated ultrasonic sensors provide long-term and reliable operation. It is able to withstand temperatures from –40 to +266°F (-40 to +130°C).


The Proline 400 transmitter includes a built-in web server, so users can access process, diagnostic, configuration, and other instrument data via any device capable of hosting a web browser. Its LCD display and web-based operating tool each show real-time measurement quality to provide key status information at a glance.


Prosonic Flow W 400 can be mounted on a wide variety of pipe types and materials with or without lining. These clamp-on flow sensors are available in multiple ultrasonic frequencies ranging from 0.3 to 5 MHz.


  • Short inlet run with FlowDC
  • Low capital investment
  • 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
  • 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
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