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Endress+Hauser 9W4B Prosonic Flow W400 Ultrasonic Clamp-on Flowmeter DN15–DN4000 Liquid Flow Transmitter

The Endress+Hauser 9W4B is a high-performance clamp-on ultrasonic flowmeter belonging to the Prosonic Flow W400 series, designed for non-invasive liquid flow measurement in industrial pipelines. Adopting advanced ultrasonic measuring principle and Endress+Hauser patented Heartbeat Technology, it delivers stable, high-accuracy flow detection without cutting or drilling the pipeline, realizing quick installation and zero medium leakage risk.

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Whatsapp : +86 17391983629‬

Email : Jayna@xinyiyb.com

Product Description

The Endress+Hauser 9W4B is a high-performance, non-invasive ultrasonic flowmeter belonging to the Prosonic Flow W400 series, engineered to deliver reliable and accurate flow measurement for a wide range of industrial liquid applications. As a product of Endress+Hauser (E+H), a global leader in industrial measurement technology, the 9W4B combines advanced ultrasonic technology, intelligent features, and user-friendly design to meet the diverse needs of modern industrial process control, making it an ideal choice for industries seeking cost-effective, low-maintenance, and safe flow monitoring solutions.

At the core of the E+H 9W4B flowmeter is the advanced ultrasonic measuring principle, paired with E+H’s patented Heartbeat Technology—a cutting-edge intelligent system that provides continuous process transparency through integrated diagnostic, verification, and monitoring functions[superscript:3]. This technology enables early detection of pipeline build-up before it affects operation, supports predictive maintenance, and ensures compliance with international standards such as ISO 9001, delivering peace of mind and reducing operational risks[superscript:4]. The flowmeter also adopts Flow DC optimization algorithm, which minimizes the required straight pipe inlet run to only 2×DN, maintaining specified accuracy even under disturbed flow profiles and limited installation spaces[superscript:5].

Designed as a clamp-on (non-invasive) flowmeter, the 9W4B eliminates the need for cutting or drilling pipelines during installation, ensuring zero medium leakage, no process interruption, and maximum operational safety[superscript:5]. Its special coupling pads enable maintenance-free operation throughout the entire product lifecycle, reducing long-term operational costs and downtime[superscript:5]. The flowmeter supports bidirectional flow measurement, independent of the liquid’s pressure, density, and conductivity, making it suitable for both conductive and non-conductive liquids alike[superscript:5].

In terms of technical specifications, the E+H 9W4B offers exceptional performance and versatility. It covers a wide pipe diameter range from DN15 (½ inch) to DN4000 (160 inches), adapting to various pipeline sizes in industrial settings[superscript:5]. The liquid temperature range it can handle is from -40°C (-40°F) to +130°C (+266°F), ensuring stable operation in extreme temperature conditions. The flowmeter delivers high measurement accuracy: ±3% of reading for DN15 pipes, ±2% of reading for DN25 to DN200 pipes, and ±2% of reading for pipes larger than DN200, with a velocity range of 0 to 15 m/s (0 to 50 ft/s) to meet different flow rate requirements. Additionally, it features strong anti-interference capability, maintaining reliable measurement even under complex working conditions such as pipeline vibration and medium temperature fluctuations.

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Pressure Transmitters for Industrial Pressure Measurement

Name: Endress+Hauser 9W4B Prosonic Flow W400 Ultrasonic Clamp-on Flowmeter DN15–DN4000 Liquid Flow Transmitter
SKU: -1

Xinyi Instrument supplies pressure transmitters for process control, hydraulic systems, petrochemical plants, water treatment, HVAC, power generation and general industrial pressure monitoring. Our pressure transmitter range covers gauge pressure, absolute pressure, differential pressure, high temperature media and digital communication applications.

Choose from compact pressure transmitters, smart 3051 differential pressure transmitters, diaphragm seal models, RS485 digital pressure transmitters and high frequency dynamic pressure sensors. Standard outputs include 4-20 mA, voltage output, HART and RS485 Modbus options, with stainless steel wetted parts and custom process connections available on request.

Pressure Transmitter Parameters

Pressure Types	Gauge, absolute, negative pressure, differential pressure
Measuring Range	From low differential pressure to high pressure ranges up to 100 MPa, depending on model
Output Signals	4-20 mA, 0-5 V, 1-5 V, 0-10 V, RS485 Modbus, HART options
Accuracy	Typical options include 0.1%, 0.2%, 0.25% and 0.5% FS
Process Connection	M20 x 1.5, G1/4, G1/2, NPT and customized thread connections
Wetted Materials	Stainless steel, 316L diaphragm and corrosion-resistant sealing options
Media	Water, oil, gas, air, steam and compatible liquid or gas media
Applications	Pipeline pressure, tank level, flow differential pressure, hydraulic pressure and automation systems

Recommended Pressure Transmitter Series

Xinyi YW-150 - differential pressure transmitter for stable industrial measurement.
Xinyi YW-3051DP - smart differential pressure transmitter for process control.
Xinyi YW-130 / YW-140 - compact pressure transmitters for general pressure monitoring.
RS485 Digital Pressure Transmitter - Modbus communication for remote monitoring systems.
High Temperature Pressure Transmitter - designed for hot media and demanding process conditions.
Siemens, Yokogawa and ABB Options - international brand transmitters available for project matching.

Pressure Transmitter FAQ

What is a pressure transmitter used for?

A pressure transmitter converts the pressure of liquid, gas or steam into a standard electrical signal for PLC, DCS, recorder or control instrument input. It is widely used for pipeline pressure, tank level, flow measurement and process safety monitoring.

How do I choose the right pressure transmitter?

Confirm the pressure range, pressure type, medium, temperature, output signal, accuracy, installation thread, electrical connection and environmental requirements. For corrosive media, high temperature or sanitary applications, diaphragm material and sealing structure are especially important.

What is the difference between gauge, absolute and differential pressure transmitters?

Gauge pressure transmitters measure pressure relative to atmospheric pressure. Absolute pressure transmitters measure pressure relative to vacuum. Differential pressure transmitters measure the pressure difference between two points and are commonly used for flow, filter and level measurement.

Can Xinyi Instrument provide customized pressure transmitters?

Yes. Xinyi Instrument can support customized pressure ranges, process connections, output signals, cable length, display options and model selection for different industrial applications.