Four tubes for precise measurement of high flows

March 27, 2024

Promass Q Coriolis flowmeters employ four-tube technology for precise measurement with minimal pressure loss over a wide range of flow rates. More recently, new additions to its lineup make it available for larger pipes than ever before—up to 10 inches (DN 250)—for measuring flow rates up to 18,900 bph (2,400 t/h). In addition to mass and volumetric flow, Promass Q also records process density and temperature. This lets it incorporate fluctuating process and ambient conditions into flow measurement, with appropriate compensation, helping achieve tight error bands of ±0.05% for mass flow and ±0.2 kg/m³ for density.

Promass Q is available in stainless steel and IP66/67-rated materials, ensuring robust and long-term operation, even in harsh conditions, such as offshore areas with high humidity and salt spray. It’s rated for process temperatures ranging from –321 °F (-196 °C) to 401 °F (205 °C), with the low-end making it ideal for measuring cryogenic fluids. With SIL ratings in compliance with IEC 61508, Promass Q is also suitable for safety-related applications. And its numerous hazardous area approvals, including ATEX, IECEx, and CSA, further expand its list of potential applications. Its compact design is reported to be unparalleled relative to its flow measurement capacity, enabling installation in confined spaces, such as on stationary or mobile skids for custody transfer.   

Promass Q’s testing highlights include:

  •        Best measuring accuracy of ±0.05% o.r., tested and confirmed in various external, accredited oil and gas calibration facilities.
  •        Density measuring accuracy of ±0.2 kg/m³ (±0.0002 g/cm³), certified by H&D Fitzgerald/U.K.
  •        Best turndown and zero-point stability in the industry.
  •        Measuring performance for liquids with microbubbles thanks to patented multi-frequency technology.
  •        Lowest pressure loss compared to conventional devices with the same line size.
  •        Repeatability of ±0.025% across the entire measuring range.
  •        Immunity to fluctuating process and ambient conditions, such as pressure, temperature and vibration.

Promass Q is complemented by Proline 300/500 transmitters’ user-friendly capabilities, inclusing a WLAN webserver for wireless operation and configuration on-site, HistoROM programming for safe configuration and device data storage, and Heartbeat Technology, making advanced instrument diagnostic, verification and secondary process value data available for consumption by host systems.