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    An air duct pressure sensor is added to the ventilation duct, and an air duct pressure value is initially set on the frequency conversion controller, and the system air volume is controlled by the frequency conversion control cabinet. When some ventilation equipment is not in use, the pressure of the ventilation supervisor changes. At this time, after the pressure sensor detects the pressure change, it converts this pressure change into a voltage signal of 0~10V and transmits it to the frequency conversion control cabinet. The frequency conversion control cabinet converts this signal into a current value to control the frequency converter and reduce The working frequency of the frequency converter, due to the change of the frequency of the frequency converter, the current generated controls the speed of the fan to achieve the purpose of reducing the exhaust air of the fan.

    The core part of Sencoch GZP series pressure sensor is a silicon pressure-resistive chip processed by MEMS technology. The front and back sides of the pressure-sensitive chip sense different pressures through the pressure nozzle, thus forming a pressure difference and generating a voltage signal proportional to the pressure difference. It can be used in industrial fields such as air flow detection, heating ventilation and air conditioning, pneumatic equipment, pressure switches, etc.