Measuring tube type

Δ

Δ-shaped (triangular) sensor type

Δ-shaped (triangular) design — maximum stiffness and vibration resistance among all measuring tube types. Two symmetrical tubes forming a triangular geometry provide high sensitivity at low flow rates (fractions of kg/h) with exceptional mechanical stability.

Technical specifications Request a quote
Max. stiffness Vibration resistance Fractions of kg/h High pressure
Δ-shaped measuring tubes of Mass-EXPERT
Overview

Δ-shaped (triangular) sensor type

The D-type (Delta) is an engineering solution in which two measuring tubes form a triangular (Δ-shaped) geometry. This configuration provides maximum structural stiffness and the best vibration resistance among all sensor types of Mass-EXPERT Coriolis flow meters. The triangular shape minimizes parasitic deformations and ensures stable readings even under strong external vibrations and pulsating flows.

DN01 / DN02 / DN25
Sizes
DN01 / DN02
Micro-flow
up to 100:1
Turndown ratio
up to 25 MPa
Working pressure (up to 70 MPa — on request)

Recommended type for precision dosing

The D-type (Delta) is recommended for mobile units, skid modules, high-precision dosing systems and packaging lines. The combination of maximum stiffness, vibration resistance and high sensitivity at micro-flow makes it the optimal choice for the most demanding dosing tasks.

Advantages

Why the Δ-shaped type is the choice for micro-flow and high pressures

The triangular geometry of the D-type measuring tubes combines record mechanical stiffness with exceptional sensitivity, opening up possibilities for tasks where other sensor types reach their limit.

Maximum stiffness

The triangular configuration provides the highest stiffness among all Mass-EXPERT measuring tube types. Minimal deformation under load, stable geometry under pressure and temperature changes.

Vibration resistance

The symmetrical Δ-shaped design effectively damps external vibrations. Indispensable for mobile units, skid modules, marine applications and facilities with a high vibration background.

Sensitivity at micro-flow

High sensitivity at flow rates from fractions of kg/h. DN01 and DN02 are specifically designed for ultra-low flow rates — precision dosing of catalysts, reagents, additives, flavorings and dyes in laboratory and industrial environments.

Hydrodynamics without stagnant zones

The optimized Δ-shaped geometry minimizes stagnant zones inside the measuring tubes. Improved hydrodynamics reduces fouling and facilitates flushing.

Operation with pulsating flows

Especially effective for gases, high-pressure liquids and media with strong flow pulsation. The high natural vibration frequency of the tubes ensures measurement stability.

Wide DN range

From micro-flow DN01/DN02 to DN25. A single Δ-shaped design for the entire range of tasks — from laboratory dosing to mid-size industrial lines.

Applications

D-type application areas

The Δ-shaped type is recommended for tasks requiring maximum accuracy at minimum flow rates under elevated vibration and high pressure

Application area Description
Precision dosing in chemicals Catalysts, reagents, modifiers — high-accuracy micro-portions for chemical and petrochemical processes
Pharmaceuticals Dosing of active pharmaceutical ingredients (APIs), excipients, control of solvent feed to reactors
Petrochemicals Additives, corrosion inhibitors, demulsifiers, antistatic agents — precision dosing into pipelines and reactors
Food & beverage Flavorings, colorants, flavor additives, vitamin premixes — accurate dosing of expensive ingredients
Gas and LPG Flow measurement of gases and liquefied petroleum gases on small lines, sampling, odorant dosing
Mobile units Skid modules, mobile dosing stations, packaging lines — compact and vibration-resistant solutions for transportable facilities

Key industries

Chemicals Pharmaceuticals Petrochemicals Food & beverage Gas and LPG Laboratory dosing Skid modules Packaging lines Biotechnology
Technical specifications

Δ-shaped (D) type parameters

Technical specifications of Mass-EXPERT flow meters with Δ-shaped measuring tubes

Parameter Value
Measuring tube type D — Δ-shaped (triangular)
Nominal diameter range DN01, DN02, DN25
Micro-flow DN01, DN02 — from fractions of kg/h
Working medium temperature range from −50 to +150 °C (standard); up to +350 °C (version C)
Maximum working pressure up to 25 MPa (standard); up to 70 MPa — on request
Accuracy class (liquid) ±0.10…±0.15%
Accuracy class (gas) ±0.5%
Repeatability ±0.05%
Turndown ratio up to 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
Process connections DIN / ANSI / GOST R flanges, threaded (for micro-flow), Tri-Clamp
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
Type comparison

Sensor configuration comparison

Δ-shaped type — micro-flow and maximum vibration resistance

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
Oil & gas
Food & beverage
LPG (propane-butane)
Dosing & blending systems
Laboratories & test benches
Biotechnology & Life Sciences

Ready to discuss your task?

We will select the optimal Mass-EXPERT configuration for your facility.

Select the flow meter yourself Product home
Наверх