The residual pressure monitoring system is used to evacuate people in the fire evacuation and escape system. The main reason is that when a fire or smoke occurs, the pressure in the stairs or in the front of the room increases, the residual pressure sensor will issue an alarm, and the residual pressure monitoring system will be linked to prevent the spread of smoke, so that the personnel can evacuate quickly and ensure the safety of the people quickly and effectively. The function of the residual pressure sensor is to control the opening and closing of the bypass pressure relief valve by monitoring the pressure difference between the front room and the stairwell and the walkway in real time, so as to control the size of the air entering the front room and the stairwell. So that the pressure difference between the front room and the stairwell and the walkway meets the national standards and norms, and ensures the safety and smoothness of the life passage.

    The differential pressure sensor module launched by Sencoch is a silicon piezoresistive pressure-sensitive 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 directly proportional to the pressure difference. At the same time, in view of the problem that the sensitivity of the pressure sensor chip is greatly affected by temperature, the calibration process is improved to eliminate the temperature impact.