传感器是一个完整的测量装置它能把被测物理量(非电量)转换为与之有确定对应关系的有用电量(电阻、电容、电感、电压、)输出,以满足信息的传输、处理、记录、显示和控制等要求。它具有灵敏度高、精确度高、可靠性高、响应速度快、小型、寿命长、价廉、多功能、智能化等特点。传感器一般由敏感元件,传感元件和测量电路三部分组成。有时也把兼有传感功能 The sensor is a complete measuring device which can convert the measured physical quantity (non-electricity) to the useful electricity output (resistance, capacitance, inductance, voltage, etc.) that has a definite correspondence with it to meet the requirements of information transmission, processing, recording, Display and control requirements. It has high sensitivity, high accuracy, high reliability, fast response, small, long life, low cost, multi-function, intelligent and so on. Sensor generally consists of sensitive components, sensing components and measurement circuit of three parts. Sometimes also have both sensing capabilities