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Brand: JUMO
JUMO flowTRANS US W02 Ultrasonic Flowmeter, Type 406051
Description
A compact inline ultrasonic flowmeter for water treatment skids
The JUMO flowTRANS US W02 (type 406051) is a compact ultrasonic flowmeter that measures flow, medium temperature and, as an option, pressure in one housing. The datasheet lists reverse osmosis, seawater desalination, wash water recovery, galvanic and surface-treatment waste water and cooling towers as its areas of application. It works on conductive and non-conductive liquids, so it can be fitted in a demineralised permeate line as well as in a brine or glycol loop. A measuring tube without moving parts or metal electrodes keeps it low-wear and easy to clean, and the 1.77 inch colour TFT display shows two configurable process values, a totalizer or batch volume next to the I/O status. The meter is inserted in plastic or metal pipework with union-end mounting sets, which makes it a neat replacement for paddlewheel meters on skid-mounted water plant.
Technical specifications
| Parameter | Specification |
|---|---|
| Type | 406051 flowTRANS US W02, ultrasonic flowmeter for liquids |
| Nominal widths | DN 15 (also a low-flow calibration), DN 20, DN 25, DN 32, DN 50 |
| Maximum flow | DN 15 low-flow 60 l/min; DN 15 80 l/min; DN 20 210 l/min; DN 25 320 l/min; DN 32 520 l/min; DN 50 1200 l/min |
| Flow accuracy | Pulse output up to ±1.0 % of measured value ±0.03 % of flowmax; reproducibility up to ±0.5 % of value ±0.03 % of flowmax; response time t90 up to 2 s |
| Temperature measurement | -40 to +125 °C, accuracy ±2 K |
| Pressure measurement (optional) | -1 to +16 bar relative for DN 15, DN 20 and DN 25; -1 to +10 bar for DN 32; ±0.4 % of span at 20 °C |
| Medium | Conductive or non-conductive liquids, viscosity up to 100 mPas, solids up to 5 % vol, gases up to 1 % vol |
| Medium temperature | -20 to +95 °C up to DN 32 (within accuracy -20 to +80 °C); DN 50 -20 to +60 °C |
| Nominal pressure | PN 16 for DN 15 to DN 25; PN 10 for DN 32 and DN 50 |
| Supply | IO-Link version DC 18 to 30 V; RS485 version DC 4.5 to 5.5 V or DC 18 to 30 V; up to 3 W in bus operation |
| Outputs (IO-Link version) | 4 to 20 mA, DC 0 to 10 V, push-pull/PNP/NPN switching or pulse output up to 10 kHz, 200 mA |
| Interfaces | IO-Link V1.1 (230.4 kBaud), RS485 with JUMO digiLine or Modbus RTU, Bluetooth and NFC with the smartCONNECT app |
| Wetted materials | Measuring tube PPSU up to DN 32, PP for DN 50; transducer PEEK; EPDM or FKM seals |
| Housing | PA66-GF25 with PMMA display cover; 215 to 445 g without screw connection |
| Protection | IP65 and IP67; UL-approved for indoor use; EMC to DIN EN 61326-2-3, emission class B |
| Ambient | -20 to +50 °C at medium up to 50 °C; up to +60 °C at medium up to 80 °C; storage -20 to +60 °C |
| Lengths and threads | L 155 mm (DN 15, G1) to 200 mm (DN 50, G 2 3/4); DN 25 is 175 mm with G 1 1/2 |
Choosing the connection and interface
The meter is delivered with an IO-Link or an RS485 electronics version, and the supply, output and plug pinout differ between them, so confirm the version before ordering. The IO-Link version provides a configurable I/O pin for a digital input, a switching or pulse output or an analog output, with limit value, batch and device error functions. The RS485 version speaks JUMO digiLine or Modbus RTU at 9600, 19200 or 38400 baud, with addresses 1 to 247, and can be set up with JUMO DSM software. Bluetooth setup within about 10 m is possible with the smartCONNECT app on iOS 14 or Android 12 or later, with NFC for authentication.
Mounting sets are ordered separately. The datasheet lists PVC-U metric and ASTM, PP socket-welding, PP butt-welding and stainless steel union ends for each nominal width, with example part numbers such as 00750874 for a DN 25 PVC-U metric set with PP nut. The total installation length with a set ranges from about 198 mm to 337 mm.
Installation and application notes
Install the meter in a horizontal or vertical pipe with the correct flow direction, keeping the inlet and outlet sections shown in the datasheet after a bend, a T-piece, a reduction or an extension. Longer straight runs may be required for demanding applications. A grounding kit is part of the delivery, and the datasheet says to use the installation instructions or operating manual for the mechanical and electrical connection. The product approval allows indoor use only, which suits a skid, a plant room or a cabinet, not an outdoor pipe rack in direct sun. In Gulf desalination and cooling water duty, check the medium against the wetted materials and seal grade, and remember that the stated accuracy applies up to 80 °C medium temperature.
Using the flowTRANS US W02 in Oman and the GCC
Desalination, water reuse and cooling water are major applications in the region, which matches the uses listed in the datasheet. On reverse osmosis skids the meter can sit in the feed, permeate or concentrate line, and because it does not depend on conductivity it also works in low-conductivity permeate, where an electromagnetic meter may struggle. In cooling tower make-up and blowdown lines, flow and temperature from one device can simplify the instrument list.
Plan for a full pipe and straight inlet and outlet runs as given in the operating manual, and avoid mounting points where air collects, such as high points in the line. On skids in hot plant rooms or outdoor shelters, check the ambient and medium temperatures against the datasheet limits, and protect the cable entries from direct sun and sand.
Information to send with an enquiry
- Pipe size and process connection
- Liquid, flow range, temperature and pressure
- Output and interface required, and whether the pressure option is needed
- Quantity and the skid or project name
Related JUMO products: JUMO flowTRANS US W01 Ultrasonic Flowmeter for Liquids, JUMO flowTRANS MAG S01 Electromagnetic Flowmeter, JUMO flowTRANS MAG I02 Insertion Electromagnetic Flowmeter, JUMO flowTRANS MAG H20 Hygienic Electromagnetic Flowmeter, JUMO flowTRANS MAG S10 Electromagnetic Flowmeter, Type 406060 and JUMO flowTRANS MAG H10 Hygienic Magnetic Flowmeter, 406061.
Documents and quotation
The hosted document is JUMO data sheet 406051 (17 pages, English). It lists accessories, mounting sets and dimensions. Confirm nominal width, interface version, pressure option and union ends before ordering. Seven Star LLC is an independent supplier in Muscat; send the pipe size, medium and signal needs for a quotation.
Datasheets & Documents
- Datasheet JUMO 406051 data sheet 406051 (EN) Download
Reviews (0)
About brand
JUMO is the German maker of temperature sensors, process controllers, pressure transmitters and liquid analysis instruments. Moritz Kurt Juchheim founded it in Fulda in 1948 as M. K. Juchheim KG, making glass thermometers with six employees. The name JUMO comes from the founder's name. It is still a family company headquartered in Fulda, and the parent company has been called JUMO GmbH & Co. KG since 2003.
Seven Star LLC is an independent supplier in Muscat. We list JUMO RTD and thermocouple probes, thermowells, transmitters, controllers, recorders and water analysis instruments, and supply them to process plants, OEMs, HVAC contractors and water utilities in Oman and the GCC by type number.
JUMO company profile
| Established | 1948, Fulda, Germany, by Moritz Kurt Juchheim |
|---|---|
| First products | Glass and contact thermometers; platinum glass sensors from 1966 |
| Ownership | Family-owned; renamed JUMO GmbH & Co. KG in 2003 |
| Product families | RTD and thermocouple probes, thermowells, temperature and pressure transmitters, controllers and thermostats, safety temperature limiters, paperless recorders, liquid analysis and flow and level instruments |
Milestones
- 1948: Moritz Kurt Juchheim founds M. K. Juchheim KG in Fulda, making glass thermometers with six employees.
- 1966: Platinum glass temperature sensors are added.
- 2003: The parent company is renamed JUMO GmbH & Co. KG.
JUMO products we list
| Family | Models | Typical use |
|---|---|---|
| RTD and thermocouple probes | 902020, 902030, 902050, 902120, 902006 2xPt100, PROCESStemp, mineral-insulated RTD, 901020 thermocouple, 901210, 902810 hygienic, 902550 surface, 902520 HVAC, MarineTemp | Temperature measurement in pipes, vessels, machines, HVAC and food plants |
| Thermowells and inserts | 909710 thermowells, 909740 measuring inserts | Protecting sensors and replacing them without opening the process |
| Temperature transmitters | dTRANS T01, T03, T04, T05, T06 SIL, T07 HART, T09, T1000 IO-Link, DELOS T switch | Converting sensor signals to 4-20 mA, HART or IO-Link |
| Pressure and level | dTRANS p20, p30, p31 hygienic, p33 Ex, p02 DELTA, MIDAS S05, MIDAS DP10, DELOS S02, MAERA S25, NESOS R20 | Pressure in process, hydraulic and OEM systems; tank and well level |
| Controllers, limiters and recorders | DICON touch, IMAGO 500, dTRON 316, iTRON, cTRON, diraTRON 104, eTRON T, safetyM STB/STW, safetyM TB/TW, LOGOSCREEN 601, mTRON T | Furnace, oven and process control, over-temperature protection and recording |
| Liquid analysis and flow | AQUIS touch S, AQUIS touch P, AQUIS 500 pH, AQUIS 500 CR, dTRANS pH 02, pH electrode, digiLine DO, ecoLine NTU, flowTRANS MAG H20, flowTRANS US W01 | pH, conductivity, oxygen and turbidity in water treatment; liquid flow |
Choosing a temperature sensor starts with the range and accuracy. A Pt100 RTD is accurate and stable from about -200 to 600 °C and is the usual choice in process plants. A thermocouple (type K or J, for example) covers much higher temperatures and responds faster but is less accurate. The wiring also matters: a 3-wire or 4-wire Pt100 connection cancels the resistance of the cable, while a 2-wire connection adds an error that grows with cable length. That is why a head-mounted transmitter is often fitted close to the sensor.
Where JUMO products are used
In Oman and the GCC, JUMO sensors and controllers are used in oil and gas and chemical plants, food and beverage production, plastics and metal heat treatment, HVAC and district cooling, water and wastewater treatment, swimming pools and marine applications.
Ordering JUMO products: what we need
Send the JUMO type number and the full order code from the label (for example 902020/10-...). For probes, add the sensor type (Pt100, Pt1000, type K or J), the number of wires, the insertion length and diameter, and the process connection. For controllers, add the input, outputs and supply voltage.
Facts checked against JUMO's company history, October 2026.
Browse JUMO products by category: Temperature Instrumentation, Pressure Instrumentation, Liquid Analysis Sensors, Controllers & Data Acquisition, Level Transmitter.
FAQ
Questions about the JUMO flowTRANS US W02 Ultrasonic Flowmeter, Type
Answers from our engineering team on installation, compatibility and integration.
01Which liquids can the US W02 measure?
Conductive and non-conductive liquids with viscosity up to 100 mPas, with up to 5 % solids and 1 % gas by volume.
02What flow range does each size cover?
Maximum flow is 60 l/min for the DN 15 low-flow version up to 1200 l/min for DN 50.
03Does it also measure pressure?
Pressure is an option and covers -1 to +16 bar on DN 15 to DN 25 and -1 to +10 bar on DN 32.
04Which communication options exist?
IO-Link V1.1 or RS485 with JUMO digiLine and Modbus RTU, plus Bluetooth and NFC setup with the smartCONNECT app.
05Can it be installed outdoors?
The datasheet states the UL approval allows indoor use only, although the enclosure is rated IP65 and IP67.
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