Capacitive Differential Pressure Transmitter

Industrial process detection faces prominent limitations with conventional pressure measuring equipment. Ordinary diffused silicon transmitters have insufficient resolution for micro-differential pressure scenarios and are prone to data deviation under high static pressure background. Traditional mechanical pressure gauges and low-precision sensors suffer from severe zero drift, poor linearity and inability to adapt to fluctuating temperature and pressure working conditions. Most single-pressure sensors cannot eliminate pipeline static pressure interference, resulting in inaccurate measurement for sealed tanks, differential flow and pressure balance systems. In long-term continuous operation, generic transmitters require frequent calibration and maintenance, increasing industrial operating costs and process risks. The Capacitive Differential Pressure Transmitter thoroughly solves the above industry pain points. Adopting advanced symmetrical capacitive δ-cell sensing structure, the central elastic measuring diaphragm forms differential capacitance with fixed electrodes on both sides. When high and low pressure act on the isolated chambers respectively, subtle diaphragm displacement causes precise capacitance difference variation. The high-frequency demodulation and digital processing circuit converts tiny capacitance changes into stable standard signals. Different from piezoresistive technology, capacitive sensing features higher sensitivity, better pressure balance consistency and stronger anti-static pressure interference capability. Built-in full-scale temperature and pressure dynamic compensation algorithm eliminates environmental drift, ensuring long-term stable and repeatable precision. It can simultaneously support differential pressure, liquid level and differential flow calculation, serving as a multi-functional core measuring device for industrial automation process control.

This industrial capacitive differential pressure transmitter supports diversified personalized customization for chemical reaction kettle monitoring, petrochemical sealed tank level detection, pipeline differential flow measurement, power plant process control and environmental protection industrial pressure testing projects. High-precision symmetrical capacitive sensing unit delivers ultra-high resolution for micro differential pressure measurement, capturing tiny pressure fluctuations that ordinary sensors cannot identify. Unique high static pressure resistance design maintains accurate differential pressure output under large background static pressure, avoiding data distortion. Intelligent digital linearization and multi-dimensional compensation technology suppress zero drift and temperature deviation, realizing long-term stable operation without frequent calibration. Fully isolated anti-corrosion diaphragm structure adapts to oily, viscous and corrosive industrial media. Industrial EMC anti-interference and vibration-resistant design ensures stable operation in complex electromagnetic and mechanical vibration environments. Compatible with multi-parameter calculation, it can convert differential pressure into liquid level and flow data for multi-scene unified monitoring. According to project demands, we can customize micro-pressure/high-differential-pressure range, diaphragm anti-corrosion material, flange standard, HART protocol, explosion-proof grade and signal output mode to meet refined industrial detection requirements.