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    The electronic sphygmomanometer is used to measure the pressure on the wall of blood vessels when blood flows in blood vessels. Electronic sphygmomanometer is one of the most commonly used instruments in medical care. It analyzes the physical condition of the subject by measuring the patient's blood pressure, and can also cooperate with other medical instruments for comprehensive diagnosis. With the development of the times and people's increasing attention to health, sphygmomanometers have begun to enter users' families and play an important role in health care. At present, the commonly used is the electronic sphygmomanometer, which is developed on the basis of the first generation of mercury sphygmomanometer. The electronic sphygmomanometer adopts the principle of oscilloscope to measure blood pressure, among which the pressure sensor plays an important role in the process of measuring blood pressure and is an indispensable device.

    The electronic sphygmomanometer, like the mercury sphygmomanometer, is pressured by inflating the inflatable sleeve on the arm. The pressure of the sleeve will rise rapidly in a short time, and then begin to decompress. When the pressure of the sleeve is greater than the blood pressure, it will block the arterial blood flow. With the decrease of the sleeve pressure, when the sleeve pressure decreases to a high blood pressure, the blood can pass through the blood vessels and produce oscillating waves, which travel through the trachea to the pressure sensor. The pressure sensor can detect the pressure and fluctuation in the measured cuff in real time. The amplitude of the oscillation wave increases with the decrease of the pressure of the cuff and the increase of blood flow. Finally, the oscillation wave becomes smaller and smaller and disappears due to the loose contact between the cuff and the arm. The cuff pressure corresponding to the maximum point of the oscillation wave amplitude is equivalent to the average arterial pressure. The cuff pressure corresponding to the fluctuation point of the forward half peak is systolic pressure, and the cuff pressure corresponding to the fluctuation point of 75%-80% of the backward peak is diastolic pressure. It can be seen that the electronic sphygmomanometer indirectly measures blood pressure through the pressure sensor to measure the cuff pressure.

    The Sencoch GZP series pressure sensor adopts MEMS technology, which makes the product have high accuracy and stability. This series of products is very suitable for non-corrosive gas measurement, and it adopts a variety of packaging forms for easy integration. Its measurement range is from -100kpa to 1000kpa, which can meet the needs of different measurement ranges. At present, 40kpa pressure sensors are very mature in the sphygmomanometer market.