Resonant Pressure Transmitter

Resonant pressure transmitter is a kind of pressure measurement device commonly used in industrial automation fields. The pressure sensor converts the measured pressure into an electrical signal by measuring the deformation under force.

Features and Advantages

1. Unparalleled Accuracy and Long-Term Stability
   Accuracy: It can achieve an accuracy better than ±0.02% of span, making it the preferred choice for trade measurement and critical control.
   Long-Term Stability: This is its core advantage. Since the output is frequency (the reciprocal of time), it is not affected by common analog circuit issues such as amplifier drift and gain drift. The annual drift can be less than ±0.1% of URL/10 years, almost eliminating the need for calibration.
2. Extremely High Resolution
   The frequency can be measured very precisely (for example, to 0.1 Hz), resulting in an extremely high resolution for pressure changes, capable of detecting very small pressure variations.
3. Excellent Repeatability
   The repeatability of the resonant frequency is excellent, ensuring highly consistent measurements each time.
4. Inherently Strong Anti-Interference Ability
   The frequency signal is not affected by cable resistance, noise, or voltage fluctuations during transmission, making it highly suitable for long-distance transmission and noisy industrial environments.
5. Direct Digital Output
   It is inherently compatible with digital systems, eliminating the need for A/D conversion and reducing error links in the signal chain.

Typical application scenarios

Resonant transmitters, due to their high cost, are mainly used in critical situations where accuracy and stability are of paramount importance:

1. Trade handover and measurement:
   Pipeline transportation and tank measurement of oil, natural gas, and petrochemical products. Accuracy is directly related to huge financial settlements and is a high-precision situation required by regulations.
2. Critical process control:
   Pressure control in fine chemical and pharmaceutical reactors, which directly affects product quality and reaction safety.
   Performance monitoring and control of large compressors and turbines.
3. Standards and calibration:
   Used as working standards to calibrate other low-precision pressure gauges in factories.
4. Energy management and efficiency monitoring:
   Main steam pressure control in power plant boilers, high-performance combustion control.
5. Aerospace and testing:
   High-precision pressure measurement in aircraft static pressure systems and engine test stands.

Comparison with piezoresistive pressure transmitters

Resonant pressure transmitters are at the pinnacle of pressure measurement technology. They are not intended to replace the widely used piezoresistive technology, but rather to meet the demands of the top 5% of applications that have almost exacting requirements for accuracy, stability and reliability.