Inline Vortex Flowmeter

Approved by：CE, SIL-3, ATEX Explosion-proof certification

An inline vortex flowmeter is a type of flowmeter installed directly in a pipeline that measures flow by detecting the vortices shed downstream of a bluff body placed in the flow. Its key feature is that it’s inserted into the flow path rather than attached around the outside, offering a compact, wafer-style or inline installation with minimal impact on pressure drop.
It's a compact, in-line device installed directly within the pipeline to measure flow by detecting vortices shed downstream of a bluff body. It combines robust sensing elements, temperature compensation, and advanced signal processing to deliver accurate mass or volumetric flow measurements across a wide range of fluids, including liquids, gases, and steam. The inline form factor minimizes pressure drop and simplifies installation, making it ideal for new installations and retrofit projects.
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  • Direct installation in the pipe with a compact footprint.

  • Best suited for clean or moderately clean fluids; heavy particulates can affect accuracy or cause fouling of the bluff body.

  • No moving parts – The sensing element never touches the fluid, so reliability is high and maintenance stays low.

  • High accuracy – Factory accuracy to ±1.0% (±1.5% typical), so you can use the numbers for control and internal billing.

  • Wide rangeability – Turndown up to 1:20 (and higher by model), so one meter covers normal and low flows.

  • Handles tough media – Works on clean liquids, dry gases, and steam, so one platform fits many services.

  • High-temperature designs – Sensor options rated up to ~350 °C, so steam and hot services are covered.

  • Strong anti-vibration – DSP-based signal conditioning resists noise, so readings stay stable near pumps or VFDs.

  • Flexible outputs – Pulse, 4–20 mA, and RS-485/Modbus, so integration with PLC/SCADA is straightforward.

  • Explosion-proof – Intrinsically safe/flameproof versions available, so you can install in hazardous zones.
  • Built-in Self-Diagnosis – Continuously monitors sensor health and electronics to ensure the meter is always in normal working condition.

  • Meter type: Inline, full-bore vortex flowmeter

  • Applicable media: Liquid, gas, and steam (saturated/superheated)

  • Nominal diameters: DN15–DN300 (inline/flange); above DN300 available as insertion type

  • Accuracy (inline): Liquids ±1.0%; Gas/steam ±1.5%

  • Repeatability: Liquid ≤0.2%, Gas/steam ≤0.5%

  • Medium temp: −40 °C to +280 °C

  • Display: LCD local display showing instantaneous and total flow; compensated versions also show temperature/pressure

  • Protection class: IP65 standard; IP68 for submerged/remote sensor versions

  • Explosion-proof grade: Ex ia IIC T5/T6 or Ex d IIB T5 (model-dependent)

  • Allowable vibration: Piezo type up to about 0.2 g; capacitive type up to about 1–2 g

  • Ambient conditions: −20 °C to +55 °C; humidity 5–90% RH

  • Install on a full, clean pipeline. The pipe should not be partially filled and should not carry large sludge or fibers that disturb vortices.

  • Match the size to the flow. If the actual pipe is too big for the expected flow, use reducers so the flow velocity stays within the meter’s working range.

  • For steam or high temperature. Keep the transmitter away from hot insulation; use the high-temperature version if the medium exceeds the standard range.

  • Avoid strong vibration. Vortex meters can compensate for some vibration, but long-term heavy vibration will reduce signal quality.

  • Periodic inspection：Calibration and periodic verification are common to maintain accuracy, especially when process conditions change (temperature, pressure, viscosity).

  • Do not weld with the meter mounted. If pipeline welding is needed, remove the instrument to avoid damaging the electronics.

  • Steam, gas, and liquid flow monitoring in process industries

  • Boiler and turbine feedwater, condensate lines, and cooling water circuits

  • Chemical processing, including corrosive and cleaning-in-place (CIP) environments when using appropriate wetted materials

  • Food and beverage pipelines requiring hygienic or sanitary designs (where permitted)

  • Water treatment, municipal utility networks, and district heating/cooling systems

  • Pharmaceutical and electronics manufacturing where clean-in-place and robust diagnostics are valued

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