yokogawarotamassadmagdigitalyewflo

Yokogawa — premium flow measurement, deep DCS integration

Rotamass Coriolis, Admag magmeters, digitalYEWFLO vortex, and the EJX/EJA-E DP family — the reference stack for Centum VP sites.

TaglineJapanese process automation major with premium Rotamass Coriolis, Admag electromagnetic and digitalYEWFLO vortex meters — and the deepest integration with Centum VP and ProSafe-RS systems.
Websitewww.yokogawa.com/eu/solutions/products-and-services/measurement/flow-meters/
Technologies
corioliselectromagneticvortexdifferential pressure
Product lines
Rotamass (Coriolis)Admag AXG / AXR / TI (Electromagnetic)digitalYEWFLO (Vortex)EJX / EJA-E (Differential pressure)

When to choose Yokogawa

Strong fit when standardising on Yokogawa Centum VP DCS or ProSafe-RS SIS, when serving APAC and Japanese-owned petrochemical and refining sites, or when very low DP measurement uncertainty matters (the EJX910 multivariable is class-leading on DP-based custody allocation).

Yokogawa at a glance

Yokogawa is the dominant DCS vendor in Japan and one of the top three globally. Their flow-measurement portfolio is built around tight Centum VP integration — every transmitter speaks FOUNDATION fieldbus and HART 7, and the device descriptions integrate cleanly into the PRM (Plant Resource Manager) asset management environment.

If your plant runs Centum VP, ProSafe-RS or STARDOM, a Yokogawa flow stack is the path of least integration friction. Outside of that universe the meters are competitive on technical merit but the integration advantage shrinks.

Coriolis — Rotamass

The current generation is the Rotamass Total Insight (Rotamass TI), and it represents the most significant Coriolis refresh from Yokogawa in a decade:

  • ±0.05% of rate liquid mass, ±0.25% of rate gas mass.
  • "Total Insight" diagnostic suite: device health, application health, calibration health and process health surfaced as four traffic-light KPIs.
  • Optional Pressure / Temperature compensation for true gas mass flow.
  • SIL 2 (single channel) / SIL 3 (redundant) certified.

The earlier Rotamass 3 / Rotamass Nano ranges are still widely deployed and remain supported.

Electromagnetic — Admag

  • AXG / AXR — the current full-bore mag families. AXG is the higher-spec line with dual-frequency excitation and class-1 accuracy (±0.2%). Standard PFA / PTFE / hard rubber / polyurethane liners.
  • AXW — water-utility-focused, MID R49 certified.
  • ADMAG TI — Total Insight branding rolling through the rest of the line.

The AXG dual-frequency excitation is genuinely useful in noisy slurry duty (mining tailings, pulp stock) where most magmeters need heavy DSP filtering.

Vortex — digitalYEWFLO

The digitalYEWFLO vortex meter is one of the more accurate vortex designs on the market thanks to its Spectral Signal Processing algorithm — it rejects mechanical and process noise better than the standard Karman-vortex DSP found on competitor units. Typical accuracy ±0.75% of rate liquid, ±1% gas / steam.

Available with integrated PT100 for temperature-compensated saturated steam mass flow (multivariable variant).

Differential pressure — EJX / EJA-E

The EJX910A multivariable transmitter is probably the single most-installed multivariable DP transmitter for compensated steam / gas custody allocation. ±0.04% of span on DP, integrated absolute pressure and PT100 RTD input. It pairs naturally with a Daniel / Rosemount Annubar primary element or an integrated DP flow nozzle.

When InstruSelect promotes Yokogawa

The selector ranks Yokogawa highly when:

  • The host DCS is Centum VP / ProSafe-RS — integration is trivial.
  • The duty is noisy slurry magnetic (AXG dual-frequency).
  • The duty is multivariable DP custody allocation — the EJX910A is the price-performance reference.
  • The site is in APAC or owned by a Japanese parent — local service and spares are typically faster from Yokogawa than the European or US majors.

For pure low-line-size Coriolis (DN6, DN10) the Endress+Hauser Promass A and Micro Motion CMFS still tend to outperform on documented zero-stability; for retrofit clamp-on duty Yokogawa does not currently make a clamp-on product line.

Datasheet sources

Curated from Yokogawa General Specifications (GS) sheets and Technical Information bulletins. Verify the live GS for any procurement decision.

Frequently Asked Questions

Is Rotamass made by Yokogawa or rebranded from another OEM?

Rotamass is fully designed and manufactured by Yokogawa (originally Rota Yokogawa GmbH in Germany, now a wholly-owned subsidiary). It is not rebranded.

What is "Total Insight"?

Total Insight is Yokogawa's onboard device-diagnostic framework. Every Rotamass TI / Admag TI transmitter surfaces four traffic-light KPIs (device, application, calibration, process) plus drill-down detail through FOUNDATION fieldbus or HART. It is the closest analogue to Emerson PlantWeb Insight or E+H Heartbeat.

Does Yokogawa make a clamp-on ultrasonic flow meter?

Not currently as a primary product line. For clamp-on duty the typical InstruSelect recommendations are E+H Prosonic Flow 90/93, Siemens SITRANS FUH or Badger Dynasonics. For inline ultrasonic custody transfer of natural gas / liquids Yokogawa partners with KROHNE / Daniel via OEM agreement on certain sites — verify project-by-project.

How does the EJX910A compare to a Coriolis on steam?

On dry saturated or superheated steam at moderate Reynolds, a properly-sized EJX910A multivariable with an Annubar primary will typically deliver 1.0–1.5% of rate uncertainty. A Coriolis on the same duty quotes ±0.5% of rate on gas mass but has a much narrower turndown and a substantially higher installed cost. Coriolis wins when accuracy at low flow matters; DP wins on CAPEX and on very large line sizes.

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