Measuring tube type

W

W-shaped micro-bend

W-shaped micro-bend — a compact solution for limited space. It is ideal for integration into control cabinets, panel assemblies and dosing units where space is at a premium.

Technical specifications Request a quote
DN08–DN100 Minimal dimensions Low hydraulic resistance Easy self-draining
W-shaped measuring tubes of Mass-EXPERT
Overview

W — W-shaped micro-bend

The W-shaped measuring tube configuration combines compactness and high measurement accuracy. The special micro-bend geometry delivers an optimal balance between dimensions and metrological performance, making this design well suited to applications with installation space constraints.

DN08–DN100
Nominal diameter
Compact
Micro-bend for confined conditions
Self-draining
Hygienic design and CIP/SIP
≤ 10 MPa
Maximum working pressure

Advantages of the W-shaped micro-bend

Minimal dimensions — compact W-shaped geometry for installation in cabinets, panels and dosing units with limited space
Low hydraulic resistance — smooth tube bends minimize pressure losses in the system
High accuracy at low flow rates — the optimized micro-bend geometry ensures stable operation at low flow rates
Vibration resistance — the rigid W-shaped tube design is less sensitive to external vibration
Easy self-draining — self-draining design with minimized stagnant zones, which is critical for the food and pharmaceutical industries
CIP/SIP compatibility — the design allows in-place cleaning and sterilization without removing the instrument

Recommended applications

The W-shaped micro-bend is optimal for precise reagent dosing, additive feed control, accounting of expensive components, as well as for integration into compact process units and laboratory benches. It is suitable for both liquids and gases.

Technical specifications

Parameters of the W-shaped micro-bend

Technical specifications of flow meters with W-shaped measuring tubes

Parameter Value
Measuring tube type W — W-shaped micro-bend
Nominal diameter range DN08 – DN100
Working medium temperature range from −50 to +150 °C (standard); up to +350 °C (version C)
Maximum working pressure up to 10 MPa (DN08–DN50); up to 6.3 MPa (DN80); up to 4 MPa (DN100)
Accuracy class (liquid) ±0.1…±0.15%
Accuracy class (gas) ±0.5%
Repeatability ±0.05%
Turndown ratio 100:1
Density measurement ±0.002 g/cm³ (standard)
Measuring tube material Stainless steel AISI 316L / 1.4404 (standard); Hastelloy C-276 (option)
Sensor housing material Stainless steel AISI 304 / 316L
Self-draining Yes — self-draining design, minimized stagnant zones
Process connections DIN / ANSI / GOST flanges, Tri-Clamp (for food and pharmaceutical applications)
Transmitters ME100, ME200, ME300, ME400 (integrated / remote)
Output signals 4–20 mA (HART), RS-485 (Modbus RTU), CAN, pulse, frequency
Explosion protection Ex db ib IIC T6 Gb; Ex db ia IIC T6 Gb; Ex ia tb IIIC T80 °C Db
Protection rating (sensor) IP66, IP67
Hygienic design Available (food, pharmaceuticals, biotechnology)
Size Maximum flow rate, kg/h
DN081 200
DN153 600
DN2512 000
DN4027 000
DN5039 000
DN80120 000
DN100180 000
Type comparison

Sensor configuration comparison

W-shaped type — self-draining design with complete drainability

Parameter UVKWLΔ (Delta)
Nominal diameter (DN) DN03–DN250DN08–DN50DN02–DN25DN08–DN100DN08–DN50DN01/DN02/DN25
Unique feature • versatility: most media and industries
• cryogenic and high-pressure versions		• face-to-face replacement without rework• ultra-high pressure (PK series)
• H₂-embrittlement-resistant materials		• self-draining + CIP/SIP
• large line sizes (up to DN100)		• minimal hydraulic resistance
• abrasives, slurries and viscous products		• micro-dosing from fractions of kg/h
• exceptional mechanical stability
Straight pipe runs required NoNoNoNoNoNo
Low flow rates and micro-dosing from DN03from DN08from DN02from DN08from DN08fractions of kg/h (from DN01)
Sensitivity HighHighHighMediumMediumVery high
Compactness MediumHighMediumHighMediumMedium
Aggressive media GoodGoodGoodGoodExcellentGood
Drainage and dead zones StandardStandardStandardFull (self-draining)Full (straight tubes)Standard
Vibration and pulsation resistance HighHighHighHighStandardMaximum
Hygienic cleaning (CIP/SIP) YesYesYesYesYesYes
Sanitary connections YesYesYesYesYesYes
Recommendation Universal solution for most tasksDirect replacement of installed equipmentHigh and ultra-high pressure (H₂, He, N₂)Self-draining designViscous, abrasive, aggressive and hygienic mediaMicro-flow (DN01/DN02), also DN25
Applications

Where it is used

Chemicals
Pharmaceuticals
Food & beverage
Dosing & blending systems
Laboratories & test benches

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