Against the backdrop of increasingly stringent global energy measurement standards, ultrasonic gas flow transducers are gradually becoming the new-generation technical standard for the measurement of natural gas, coal gas, hydrogen, etc., leveraging their core advantages such as no moving parts, long service life, and high accuracy. In this process of technological evolution, the selection of operating frequency has become a key factor defining the performance boundaries of the sensor and its suitability for application scenarios.
Frequency Defines Application Boundaries
The key to selecting a gas flow transducer with the appropriate frequency lies in identifying the core requirements of the application scenario:
Scenarios for selecting a 200kHz transmission frequency transducer
When the application scenario requires covering a wide flow range, and where there might be minor impurity interference in the field conditions, the 200kHz transducer, with its excellent penetration capability and wide turn down ratio characteristics, becomes the ideal choice for the industrial measurement field. Especially in projects that are cost-sensitive yet require reliable measurement, the 200kHz option offers a perfect balance between performance and economy.
Scenarios for selecting a 500kHz transmission frequency transducer
For application scenarios that require detecting minimal flow rates, pursue extremely high safety standards, or need fast dynamic response, the high sensitivity and precise timing capability of the 500kHz transducer are indispensable. In high-end applications such as safety early warning systems, precision gas measurement, and high-efficiency equipment control, the 500kHz frequency demonstrates irreplaceable technical value.
200kHz: A Robust Choice for Industrial Measurement with Wide Turn down Ratio
The 200kHz ultrasonic gas flow transducer achieves an optimal balance between detection depth and signal stability in gaseous media. Its longer wavelength experiences relatively less attenuation when propagating through gas, enabling effective penetration through the flow field and providing a more robust response to flow velocity changes.
Applications:
Gas flow monitoring at city gate pressure regulating stations.
Full-flow measurement for residential and industrial gas meters.
Fuel gas supply control for industrial burners.
Wide Turndown Ratio and High Adaptability
The 200kHz ultrasonic gas flow transducer maintains stable signal output across both high and low flow velocities. Its wide turn down ratio makes it particularly suitable for industrial sites with significant flow fluctuations and for recording full-period consumption in residential gas applications, effectively avoiding issues of non-measurement at low flow rates and inaccuracy at high flow rates.
Excellent Penetration and Anti-interference Capability
It offers better penetration against minor contaminants like condensate water or dust within the pipeline. The signal from the 200kHz transducer is less affected by disturbances in complex flow fields, ensuring measurement reliability and long-term stability under non-ideal operating conditions.
System Integration and Cost-Effectiveness
Ultrasonic flow measurement technology in the 200kHz frequency band is mature, with relatively simplified circuit design. It integrates easily with existing ultrasonic gas meter main boards, providing meter manufacturers with a cost-effective and high-performance sensing module.
500kHz: Sensitive Micro-flow Detection and Dynamic Response
The 500kHz ultrasonic gas flow transducer, by virtue of its higher frequency, possesses a shorter wavelength and superior timing resolution. This grants it higher perception sensitivity for minute flow changes and flow field details.
Applications:
Precision measurement of high-purity or specialty gases in laboratory environments.
Gas micro-leak detection and safety early warning systems.
Precision energy consumption management for high-end gas appliances.
High Precision Micro-flow Detection
It boasts exceptional identification capability for very low flow velocities (such as minimal leakage flows after appliance shutdown), contributing to early safety warnings and enhancing the safety standards of gas usage.
High Dynamic Response and Instantaneous Measurement
Its extremely short detection cycle enables rapid capture of instantaneous flow changes, providing a precise data foundation for the real-time control of gas equipment (e.g., high-efficiency gas boilers), thereby aiding energy efficiency optimization.
Excellent Initial Measurement Accuracy
It demonstrates high linearity and accuracy right from the initial stages of measurement, effectively addressing the industry pain point of larger errors at the lower end of the flow measurement range typical of traditional meters, and achieving precise measurement throughout the entire life-cycle.
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