In order to long-term monitor gas changing rule of internal environment of special equipment

an embedded gas sensing system is researched and fabricated based on STM32 MCU. The core sensors use SHT15 digital temperature and humidity sensor

LOX02 digital oxygen sensor

and independently developed MEMS hydrogen sensor. An unique low power consumption supply scheme is designed to effectively reduce sleep power consumption of the system. Test results show that the system can accurately measure some important indicators of environment

such as temperature

humidity

gas pressure

oxygen concentration

hydrogen concentration

and so on. It is of great significance to the reliability evaluation of special equipment.