The Prosonic Flow W clamp-on sensor is designed specifically for water and wastewater flow measurement. Combined with the highly cost-effective Prosonic Flow 91 transmitter with push-button operation, the Prosonic Flow 91W becomes the ideal device for flow monitoring in the water industry.
Advantages
Low investment cost - the larger the pipe diameter (up to DN 4000), the better the cost-effectiveness of the investment
Long-term signal stability - permanently installed from the outside using coupling pads, maintenance-free
High process transparency – with diagnostic functions
Economical transmitter - easy to use
Fast, reliable commissioning - installation via the quick setup menu
Automatic data collection for maintenance purposes
Application areas
The choice of measuring principle does not need to take into account the measuring conditions, including pressure, density, temperature and viscosity
Clamp-on measurement of process water, brine, demineralized water, drinking water and wastewater.
Device features:
Medium temperature: –20 to +80 °C (-4 to +176 °F)
Degree of protection IP68 (6P housing) for underwater pipes
Shock and vibration resistance in accordance with IEC68-2-6
Aluminum housing for field-mounted transmitter
Display shows two lines of text with push-buttons
HART
Spare Parts & Accessories 26
26 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71138304 | PCB main board 91W 85-250VAC | Details |
| 71138309 | 91W Main Board 20-28VAC 11-40VDC | Details |
| 50104749 | fuse | Details |
| 50104750 | fuse | Details |
| 50104745 | display module with push buttons | Details |
| 50094004 | Transmitter T-DAT Data ModuleKit T-DAT Transmitter Data Chip | Details |
| 50097147 | Grounding terminal / Cover locking clamp10/1YH/23/65/72/73/91W/92F/8FF/8FE/8CM | Details |
| 50108138 | terminal blockKit Terminal Block 10/91W | Details |
| 50104746 | cover with glass window | Details |
| 50104747 | blind cover | Details |
| 50098041 | adapterKit 10 extension M20x1.5/G 1/2" | Details |
| 50098042 | adapterKit 10 extension M20x1.5/NPT 1/2" | Details |
| 50103658 | cable gland | Details |
| 50104748 | Display module bracket | Details |
| 71022832 | cable gland for wall-mounted enclosure | Details |
| 71022835 | Wall-mount accessory | Details |
| 71023273 | gasket | Details |
| DK9WS- | Ultrasonic Flowmeter W, Sensor AssemblyFor use with Prosonic Flow 90/91/92T/93 | Enquire |
| DK9SS- | Ultrasonic 91/93/93T, sensor cable | Enquire |
| DK9SH- | W/P Type Sensor Holder Assembly DK9SH | Enquire |
Configurator / Comparison
Accessories / Spare parts
Measuring principle video
Click to playSource:Endress+Hauserpublic information from the website
Case Studies
Municipal Wastewater Treatment · Ultrasonic flowmeter — Application Case
Project Overview
The site is the inlet, biological and outlet stages of a municipal plant. The customer wanted Ultrasonic flowmeter properly configured on the existing plant, with the aim of transit-time ultrasonic measurement of liquid or gas flow.
Technical Challenges
What actually causes trouble is high solids and corrosive fractions, with large diurnal flow swings, and effluent parameters drift and probes foul with sludge and biofilm. All of this means the Ultrasonic flowmeter configuration has to involve checking straight runs, pipe internal condition and entrained gas.
Configuration
Supply and installation were organised through the flow range: flow solution matched to line size, medium and range. On site this meant checking straight runs, pipe internal condition and entrained gas, checked line by line against: stable compliance with Grade 1A discharge limits and online data reporting.
Performance
After commissioning the outcome is clamp-on versions avoid pipe work, minimising shutdown in revamps, and the readings are now used for process tuning.
Food & Beverage · Ultrasonic flowmeter — Application Case
Site Conditions
This is a Food & Beverage customer whose plant is at dosing, pasteurising, filling and CIP stages. The main task was transit-time ultrasonic measurement of liquid or gas flow.
The Problem
The difficulty lies in syrups, dairy and beverages that scale easily, under strict hygienic requirements; at the same time frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. Specification therefore means checking straight runs, pipe internal condition and entrained gas.
What We Did
We took a flow range approach — flow solution matched to line size, medium and range. Delivery was built around checking straight runs, pipe internal condition and entrained gas, with point-by-point checks on: food-safety and hygienic design per 3-A / EHEDG.
Operating Outcome
In service the system performs as intended — clamp-on versions avoid pipe work, minimising shutdown in revamps, with routine maintenance falling noticeably.
Chemical & Pharmaceutical · Ultrasonic flowmeter — Application Case
Application Context
reactors, metering vessels and finished-product tanks is a typical Chemical & Pharmaceutical duty. The project started from Ultrasonic flowmeter, focusing on transit-time ultrasonic measurement of liquid or gas flow.
Process Constraints
corrosion plus Ex protection shortens instrument life and makes downtime costly, and highly corrosive media with solvents and crystallisation, partly in explosive atmospheres only amplify it. The Ultrasonic flowmeter specification must therefore cover checking straight runs, pipe internal condition and entrained gas.
Delivery Approach
Delivery was handled as the flow range — flow solution matched to line size, medium and range. Execution centred on checking straight runs, pipe internal condition and entrained gas, together with Ex certification and GMP traceability of records.
Field Results
Operation shows the benefit clearly — clamp-on versions avoid pipe work, minimising shutdown in revamps, with confidence in this measuring point improving markedly.
Power & Energy · Ultrasonic flowmeter — Application Case
Customer Profile
The typical setting in Power & Energy is boiler feedwater, turbine condensate and FGD/DeNOx systems. The measuring point is Ultrasonic flowmeter; the focus is transit-time ultrasonic measurement of liquid or gas flow.
Key Difficulties
Conditions are high temperature and pressure with both steam and saline water and, on top of that, drift under high temperature and pressure, with very costly unplanned outages, which a standard configuration cannot handle for long. The design therefore starts with checking straight runs, pipe internal condition and entrained gas.
Implementation
The scope ran through the flow range: flow solution matched to line size, medium and range. Technically it hinges on checking straight runs, pipe internal condition and entrained gas, and on these requirements: compliance with power-industry codes and unit availability targets.
Customer Benefit
In practice this means clamp-on versions avoid pipe work, minimising shutdown in revamps, which cut the workload on the site maintenance team.
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