Refineries producing gasoline, diesel and other products need to eliminate the risk of explosion and fire as much as possible due to the presence of large quantities of flammable and explosive gases and liquids, and strict control of cables and batteries. A refining and chemical company wanted to monitor the temperature of the pipeline and the efficiency of the pipeline insulation, but it was difficult to find a suitable solution. After using self-powered power supply + wireless sensor, the monitoring scheme was successfully realized. The self-powered power supply can draw heat from pipe flanges, valves, etc., and drive nearby wireless sensors to work. Moreover, the self-powered power supply is an intrinsically safe explosion-proof product, which does not add additional risks