根据腐蚀电化学原理，应用微机技术对地下工程环境大气的腐蚀性、温度、湿度、ｐＨ 值进行监测，其测试单元具有高灵敏度、自动选择量程、自动测量等功能，控制主机通过与各测试单元进行数据通讯，控制各测试单元进行周期及随机测量，接收、贮存、处理并显示各测试点数据，并可通过扩展串口与ＰＣ机进行数据通讯，接受其控制． According to the principle of electrochemical corrosion, the corrosion of the underground engineering environment, temperature, humidity and pH value are monitored by microcomputer technology. The test unit has the functions of high sensitivity, automatic selection range and automatic measurement. The control unit communicates with each test unit Data communication, control of the test unit cycle and random measurements, receiving, storage, processing and display the test point data, and through the expansion of serial data communication with the PC, to accept its control.