In order to meet the market demand, we plan to cooperate with colleges and universities to develop a series of intrinsically safe temperature and humidity probes, which can meet the requirements of humidity measurement in dangerous areas (eexiiict4). The muffler of centrifugal fan has passed the explosion-proof certification and is small in size and suitable for use in narrow space. The product has high precision, lag, long-term stability, not affected by dust, chemical gas and other environmental factors, dustproof, waterproof and splash proof. The cable length of probe and electronic components can be determined by the user. Through the connector and 6-core shielded cable, the cable length can reach 100 meters. It is also suitable for outdoor installation, process control and equipment operation monitoring. Through collaborative development, the automatic air duct muffler monitoring of the whole piling process is realized, the technical problems of large hydraulic transmission flow and fast speed change are solved, and the requirements of mechanical and electrical integration are realized. The product requires high piling frequency, adjustable striking energy and simple operation. The system diagnosis of hammer body is realized by computer digital control; the service life of the product is long and the vibration is small, which does not affect the strength of other buildings; the environment is kept clean and there is no exhaust emission.