Gas pressure sensor
At present, the most critical components used in electronic sphygmomanometer are divided into two types, one is capacitive gas pressure sensor and the other is resistive gas pressure sensor. 1. Electrostatic capacitive gas pressure sensor The mainstream sensor used in electronic sphygmomanometer has the advantages of good linearity and easy temperature compensation. The disadvantage is that there is no standard product. Only a few companies in the world can make this kind of sensor, and they have patents on this technology, and only these companies will use it. Companies with patents for this technology include: Jinyidi Technology Co., Ltd., Japan Omron, Japan Aeande, etc. 2. The resistive gas pressure sensor has been used by manufacturers in Taiwan Province Province and some manufacturers in Chinese mainland this year. Its advantage is that it can use standard products (produced by IC company), which is especially beneficial for solution providers to promote their own solutions, and manufacturers who buy solutions do not need to manufacture sensors themselves. Its disadvantage is that temperature compensation is not easy.
10. biosensor definition: a device that uses biological substances (such as enzymes, protein, DNA, antibodies, antigens, biofilm, microorganisms, cells, etc.). ) as an identification element, the biochemical reaction is transformed into quantifiable physical and chemical signals, so as to realize the detection and monitoring of living substances and chemical substances. Biosensor is an instrument that is sensitive to biological substances and converts their concentrations into electrical signals for detection. It is an analytical tool or system composed of immobilized bio-sensitive materials as recognition elements (including enzymes, antibodies, antigens, microorganisms, cells, tissues, nucleic acids and other bioactive substances). ), appropriate physical and chemical transducers (such as oxygen electrode, photosensitive tube, field effect tube, piezoelectric crystal, etc.). ) and signal amplification device. Molecular recognition elements in biosensors are sensitive elements, which can be divided into five categories: enzyme sensors, microbial sensors, organ sensors, tissue sensors and immunosensors. Obviously, the sensitive materials used are enzymes, microbial individuals, organelles, animal and plant tissues, antigens and antibodies in turn.