The biosensor is a biologically active material (enzymes, proteins, DNA, antibodies, antigens, biofilms, etc.) and physical and chemical transducers combine in an interdisciplinary, is an advanced detection methods essential to the development of biotechnology Fast, trace analysis and monitoring methods, but also the material at the molecular level. Various biosensors have the following common structure: comprising one or more of the bioactive material (biofilm) and able to express biologically active signal is converted to an electrical signal a physical or chemical transducer (sensor), a combination of both together, speed sensors, instrumentation and automation with modern microelectronics technology for reprocessing biological signals, temperature and humidity sensors, constitute biosensor analysis apparatus, instruments and systems Sensitivity Sensitivity refers to a variety of sensors that can be used in steady-state operation of the sensor (FIG. 5) sensor (5) at the output ratio of the amount of change △ y △ x of the input changes. It is an input output characteristic curve slope. If significant linear relationship between the output and the input of the sensor, the sensitivity S is a constant. Otherwise, load cell, it will vary with the input changes. Sensitivity is the output dimension, dimensionless ratio of input volume. For example, a displacement sensor, Zhoushan sensor when displacement 1mm, the output voltage is 200mV, then the sensitivity should be expressed as 200mV / mm. When the output, the input is the same dimension sensor sensitivity understood as magnification. Improve the sensitivity, a higher measurement accuracy. However, higher sensitivity, the more narrow the measurement range, stability is often worse. Sensor type _ Xinfeng (certified) _ Zhoushan sensor provided by the Xinxiang City Xinfeng purification Sensing Technology Co., Xinxiang City, Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) (www.xfcgjh.com) is a leader in Xinxiang, sensors, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. In Xinfeng leadership with the staff warmly welcome all inquiries negotiations to create a better future Xinfeng.