Impact on the environment of temperature humidity believes everyone not unfamiliar, and temperature and humidity sensor in the application of all kinds of public facilities is also very common, in our life also have a wide range of applications, such as temperature and humidity sensor in the application of underground environment, so how specific application, from two aspects of interior and pipeline in detail.

Subway has become an essential means of transportation and sports in big cities in China. It has the advantages of large traffic volume, good punctuality, fast safety, high traffic efficiency and environmental protection. Because of the large number of subway passengers, how to provide a comfortable environment for passengers has become a problem to be considered and solved by the transportation department. This requires a well-designed environmental control system, in which temperature and humidity sensors are necessary detection tools.

In the environmental control system of subway, indoor temperature and humidity sensor and pipeline temperature and humidity sensor are mainly used. The large volume of the subway, that is, the large passenger flow, the need for a large change in the amount of fresh air. Therefore, the air conditioning load of subway varies greatly, which requires the means of automatic control to realize energy saving. As an indispensable part of the automatic control system, environmental sensors play an important role in subway.

Indoor temperature and humidity sensors can be set in public areas such as the station hall and platform area as well as important equipment rooms to monitor the real-time temperature and humidity of the station. These parameters can help operators make reasonable adjustments to the operating conditions of various systems in the station, so as to keep the public area of the station in a relatively comfortable environment and ensure that the equipment room is always under the appropriate temperature. Indoor temperature and humidity sensors are usually installed in the station hall, platform and equipment room on the wall or top.

At the same time, we can install pipeline temperature and humidity sensors in the station's fresh air room and return air room to monitor the outdoor fresh air and the temperature and humidity inside the station. Environment control system can be based on sensor collected data to infer the station of environmental quality, and according to the designed a variety of conditions for automatic switch in advance, in order to realize the automatic control system for automatic control of the station environment, making the station environment is always in a more comfortable environment, and finally achieve the purpose of energy-saving emission reduction. The pipe temperature and humidity sensors are usually mounted on the walls of the fresh air chamber and the return air chamber.