Coriolis Mass Flow Controller: Precise Measurement and Control of Low-Flow Rates Under High-Temperature and Low-Temperature Conditions
In the fields of process control and commercial metering, mass flow meters are assuming an increasingly critical role. As industrial automation and intelligence continue to advance, the demand for multi‑parameter fluid sensing and closed‑loop precision control is steadily growing. Leveraging its core capability of directly measuring mass flow, the Coriolis mass flow meter has become the preferred metrological instrument in applications such as petrochemicals, food and pharmaceuticals, and cryogenic processes. Beijing AccuFlow Technology’s self‑developed ACU20FEH series of low‑flow Coriolis mass flow controllers can operate reliably over extended periods in industrial environments characterized by extreme temperatures, high pressures, and mild vibrations, earning widespread acclaim for their exceptional measurement accuracy and independence from fluid properties.
ACU20FEH-LC Coriolis Mass Flow Controller
Unlike indirect mass flow meters such as thermal‑type and differential‑pressure types, Coriolis mass flowmeters do not rely on temperature signals or volumetric flow rates for conversion. Instead, they directly measure fluid mass flow by exploiting the Coriolis effect, yielding results that are minimally affected by process‑condition fluctuations and insensitive to variations in fluid temperature, pressure, density, conductivity, and viscosity. The ACU20FEH employs a uniquely shaped single‑loop sensor that forms part of the oscillation system. As fluid flows through the sensor loop, Coriolis forces induce a variable phase shift; the sensor detects this phase shift and transmits it to a DSP processor on the integrated circuit board for computation. The resulting output signal, which is proportional to the actual mass flow rate, maintains a highly linear relationship even under changing process conditions—such as variations in pressure, temperature, density, conductivity, and viscosity—delivering exceptional performance.
High‑ and low‑temperature environments pose significant challenges to precision flow measurement. Under high‑temperature conditions, equipment must address material‑property changes and measurement‑stability issues arising from variations in the process fluid’s temperature. In cryogenic applications, sensors, sealing assemblies, and connecting components must exhibit appropriate low‑temperature resistance to minimize the impact of temperature fluctuations on system performance.
ACU20FEH-LC Low-Temperature Coriolis Mass Flow Controller
The ACU20FEH series’ key highlight is its wide operating temperature range, enabling stable measurement and control across conditions from –200°C to +200°C, thus supporting a broad spectrum of applications—from the transport of cryogenic media to the handling of high‑temperature fluids. For instance, in the delivery and metering of low‑temperature media such as liquid nitrogen, this series offers tailored solutions for cryogenic flow monitoring; similarly, in high‑temperature chemical processes and experimental testing, it can be employed for flow measurement and control under corresponding thermal conditions.
Compared with conventional devices that have a narrower operating temperature range, the ACU20FEH offers greater flexibility in selecting equipment for both high- and low-temperature applications, helping to reduce the need for frequent replacement of measurement instruments across varying thermal conditions. In practical use, suitability should still be verified by considering the process medium’s temperature and pressure, material compatibility, and specific installation requirements.
The ACU20FEH, which is capable of operating across a wide temperature range, simultaneously measures mass flow rate, fluid density, and temperature, with output capabilities, and offers two accuracy levels: ±0.25% for liquid measurements. Alternatively, gas measurement accuracy is ±0.5%, which is sufficient to meet the needs of most customers and can be used both in laboratories for various experiments and in complex industrial environments.
ACU20FEH-XM Coriolis Mass Flow Meter
This series covers flow rates ranging from very low to relatively high, allowing users to select the appropriate model based on their specific requirements. It is suitable for measuring gases, liquids, and supercritical fluids. With its direct mass‑flow measurement, multi‑parameter monitoring, and wide operating temperature range, the ACU20FEH finds applications in semiconductor manufacturing, the petrochemical industry, fermentation and pharmaceutical equipment, various analytical instruments, fuel‑cell power‑supply systems, and food‑packaging operations, among others.
Overall, as industrial production continues to advance toward greater precision and automation, the ACU20FEH series of Coriolis mass flowmeters is expected to deliver enhanced value in applications such as high- and low‑temperature flow measurement, micro‑flow control, and precise quantitative feeding.
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