Product Technology
Duweyintelli flow meters are equipped with high-precision sensing technology, meet international standards, and enable accurate monitoring and intelligent management of industrial fluid data.
AC series vortex flow meters
The AC series vortex flow meter, a velocity-type flow meter developed based on the Karman vortex street principle, boasts precise measurement performance, a unique structural design, and rich functional configuration. It is widely applicable to flow measurement and control scenarios for liquids, steam, and most gases, providing a stable and reliable solution for flow monitoring in industrial production. The following analysis comprehensively examines its advantages and practical value from three dimensions: product performance, core selling points, and main functions.
1. Product Performance: Precise and stable, adaptable to diverse working conditions
With precision and environmental adaptability as its core design goals, the product achieves stable operation under complex working conditions through scientific structural parameters and advanced signal processing technology. Its specific performance advantages are reflected in the following aspects:
1.1 Wide measuring range and high precision, ensuring reliable measurement results.
The instrument’s measurement accuracy covers multiple levels, including 1.0, 1.5, and 2.5, to meet the accuracy requirements of various scenarios. It boasts excellent range ratio performance, with a commonly used range ratio of 10:1 and a maximum of 15:1. Combined with a wide range of nominal diameters (15mm to 300mm and above), it can adapt to diverse flow scenarios. For example, with a DN50 diameter, the liquid flow measurement range is 3.5-35 m³/h, the gas flow range is 35-350 m³/h, and the saturated steam mass flow rate at 0.4 MPa pressure ranges from 78.5-698 kg/h, fully covering the conventional flow range in industrial production. Its core measurement principle calculates flow velocity by detecting the vortex shedding frequency. The Strouhal number remains stable between 0.17 and 0.18, ensuring the accuracy of flow calculation. The application of the instantaneous flow calculation formula Q=3600×F÷k (where F is the frequency and k is the instrument coefficient) further enhances data accuracy.
1.2 Highly adaptable to environment and resistant to extreme conditions.
In terms of environmental adaptability, the product performs exceptionally well: the operating temperature range covers -20℃ to 350℃ (depending on the model), the ambient temperature adaptability range is -20℃ to 55℃, and the relative humidity tolerance reaches 5%-95%, enabling it to cope with harsh working conditions such as high and low temperatures. The standard protection rating is IP65, which can be upgraded to IP68 upon request. The explosion-proof rating is ExdII CT6 Gb, suitable for flammable and explosive hazardous environments. The permissible vibration acceleration is 0.2g, and with optimized circuitry and anti-vibration treatment, it effectively filters out mechanical vibration interference, ensuring measurement stability in industrial vibration scenarios. The standard pressure rating is PN16, and higher pressure specifications can be customized through protocols. The body material is SS304, and SS316L can be selected for special requirements, offering excellent corrosion resistance and extending service life in corrosive media.
1.3 Stable signal transmission and efficient data exchange.
The instrument is equipped with multiple signal transmission methods, including 4-20mA current output, pulse output, and RS485 communication. The RS485 communication supports Modbus-RTU/ASCII dual modes, with a default baud rate of 19200bps (not less than 9600bps). The calibration method can be selected as no parity, even parity, or odd parity. The device address range is 1-247, allowing for flexible integration into industrial control systems. The current output is precisely calibrated, with zero-point and full-scale calibration ranges of 3.0-5.0mA and 19.0-21.0mA respectively. Correction can be made using multimeter measurements to ensure a linear correspondence between the output signal and the actual flow rate. The load resistance is ≤500 ohms, making it compatible with most industrial receiving devices.
2. Key Selling Points: Innovative Structure, Convenient Operation and Maintenance
The product breaks through traditional design and user experience, with “maintenance-free, interference-resistant, and easy to operate” as its core selling points, significantly reducing users’ usage and maintenance costs.
2.1 Non-blocking structural design, extremely low failure rate.
The sensor and wetted parts are made entirely of stainless steel, featuring a simple structure with no moving parts. The design deliberately avoids holes, gaps, and gaskets that can easily trap dirt and grime, reducing the likelihood of clogging at its source. The sensor does not directly contact the measured medium, and combined with water hammer and lightning protection designs, it not only reduces the impact of media corrosion on core components but also enhances equipment safety under extreme conditions. This non-contact detection method ensures constant instrument coefficients, high data repeatability, and eliminates the need for frequent calibration over long-term use.
2.2 Excellent anti-interference capability and more stable operation.
To address common interference issues in industrial settings, the product has undergone specific optimizations: the circuitry employs mechanical vibration damping to effectively filter out interference frequencies generated by mechanical vibrations; optimized grounding design and signal filtering technology reduce the impact of high-voltage and other electrical interferences on measurements, preventing false signal output when there is no flow. The converter utilizes advanced analog and digital dual signal processing, eliminating zero-point drift issues. Even in scenarios with significant flow fluctuations, stable display can be achieved through damping time adjustment (adjustable from 0.1-30.0s).
2.3 Easy to install and maintain, adaptable to diverse scenarios.
The installation offers flexible and diverse options, supporting three mainstream methods: clamp-on, flange connection (compliant with GB/T9119-2000 standard), and threaded connection. Users can freely choose according to pipe specifications. Flange connections cover pressure ratings such as PN10, PN16, and PN40. Taking a DN100 flange with PN16 as an example, the center distance is 180mm, and it is equipped with 8 M16 bolts, offering strong installation adaptability. The instrumentation is isolated from the process flow, facilitating easy disassembly and assembly. The converter and sensor have excellent compatibility, eliminating the need for complex adjustments during maintenance. A clear full-dot-matrix LCD display is provided, supporting simultaneous display of parameters such as instantaneous flow rate, total flow, temperature, and pressure. The operation buttons are clearly defined, and the parameter setting process is simple, allowing even beginners to quickly learn how to use it.
2.4 Strong customization capabilities to meet specific needs.
The product supports multi-dimensional customization. For materials, SS316L corrosion-resistant material can be selected as needed; flange specifications can be customized to American standard, European standard, and other non-standard types; the protection level can be upgraded to IP68 to adapt to humid or immersion environments; the power supply supports dual modes of DC24V and 3.6V battery, allowing normal operation even without an external power source. For special media, personalized measurement needs can be met by selecting gas operating condition/standard condition flow mode and configuring PT100/PT1000 temperature sensors or absolute pressure/gauge pressure sensors.
3. Main Functions: Comprehensive Coverage of the Entire Measurement Process
The instrument uses “measurement-control-data management” as its core functional chain, integrating multiple functions such as parameter setting, calibration, alarm, and communication to form a complete flow monitoring solution. Specific functions are as follows:
3.1 Multiple parameter settings to adapt to different media
It offers a wide range of parameter configuration options to ensure accurate measurement of different media. Flow units support multiple types, including L/s, m³/h, Nm³/h, USG/h, Kg/h, and t/h. The number of decimal places for instantaneous flow rate and total flow rate can be adjusted between 0 and 3. Through factory parameter settings (password 052500), the fluid type can be selected to match different calculation algorithms for gas operating conditions/standard conditions. The instrument coefficient can be corrected based on actual flow measurement results to ensure matching with actual operating conditions. The application of the formula Q=3600×F÷k makes the flow calculation more closely reflect the characteristics of the medium. Furthermore, the standard/operating condition compressibility coefficient can be set for precise compensation for gaseous media.
3.2 Precise calibration function ensures long-term accuracy.
It features a comprehensive built-in calibration system covering the calibration of current output, temperature, and pressure measurement circuits. Zero-point current calibration can be automatically completed by inputting the measured value from a multimeter, calibrating the 4mA output. Full-scale current calibration corrects the 20mA output; if the deviation is large, it can be adjusted multiple times, with maximum input values of 5.0mA and 21.0mA for each correction. Temperature and pressure calibration support manual input of measured values for correction. The pressure sensor can be selected in absolute pressure, gauge pressure, or fixed pressure mode. The temperature sensor is compatible with PT100/PT1000 types, ensuring accurate temperature and pressure compensation, making it particularly suitable for measuring media such as gases and steam that are significantly affected by temperature and pressure.
3.3 Flexible output and alarm functions enable process control.
The output modes support frequency output, pulse equivalent output, and raw signal output. The upper limit of the frequency can be adjusted between 100.0-5000.0Hz. The output frequency has a linear relationship with the instantaneous flow rate (output frequency = instantaneous flow rate ÷ range × upper frequency limit). The pulse equivalent unit can be set as needed to L/P, USG/P, Kg/P, etc., and the pulse width is adjustable from 0.0-1000.0ms. When set to 0, the duty cycle is 1:1, adapting to different flow accumulation and recording needs. In terms of alarm function, it supports high/low flow alarm settings. The alarm threshold is in units of range percentage (high alarm 1.00%-99.00%, low alarm 0.00%-99.00%). When the flow exceeds the threshold, the corresponding alarm contact closes, providing timely feedback on abnormal operating conditions. Combined with the small signal cutoff function (0.00%-9.90% of the range), it can filter out invalid signal interference.
3.4 Data communication and display facilitate efficient management.
Equipped with a 45×30 full-dot matrix LCD display, it clearly displays key parameters such as instantaneous flow rate and unit, cumulative flow rate, temperature, and pressure. For example, under standard conditions, it can simultaneously display instantaneous flow rate of 315.000 Nm³/h, pressure of 0.1013 MPa, and temperature of 32.4℃. The RS485 communication function supports seamless integration with a host computer system. The communication address table covers key parameters such as instantaneous flow rate (register first address 0x01), total flow rate (0x04), temperature (0x09), and pressure (0x0b). Data types include floating-point and double-precision numbers, enabling remote acquisition and centralized management of flow data, providing data support for production scheduling and energy consumption statistics.
3.5 Fault self-diagnosis prompts reduce operation and maintenance costs.
A comprehensive troubleshooting system has been developed to address common fault scenarios. When issues such as “no output when power is on,” “incorrect signal output when there is no flow,” or “unstable instantaneous flow display” occur, the instruction manual clearly outlines the possible causes and solutions—for example, if there is no output, check if the medium flow rate is lower than the starting flow rate or if the power supply wiring is correct; if the display is unstable, check the grounding line or clean any debris inside the casing. This clear troubleshooting guidance lowers the maintenance threshold, reduces equipment downtime, and improves production efficiency.
4.Summary: A Reliable Partner for Industrial Flow Measurement
The AC series vortex flow meter effectively solves problems such as low accuracy, difficult maintenance, and poor adaptability in industrial flow measurement through three core advantages: “precise and stable measurement performance, innovative and convenient structural design, and comprehensive and diverse functional configuration.” Its non-blocking structure extends equipment life, its wide measurement range and high accuracy meet diverse needs, and its rich output and communication functions achieve full-process coverage from on-site measurement to remote management. Whether in ordinary liquid measurement, steam metering, or flammable and explosive gas monitoring, it demonstrates excellent practical value, providing strong support for precise control and efficient management in industrial production.
