The drug production process must go through the process of weighing materials, adding solvents, filtration, sterilization, filling, sealing and so on. Acetone, methanol, alcohol and other flammable reagents used in the pharmaceutical process. During the filling and sealing process, nitrogen and carbon dioxide are added to prevent the drug from being oxidized. Nitrogen and carbon dioxide are harmful gases that seriously harm health. The ASD5300, ASD5300C detector and JB-TB-ASD5100 alarm controller are provided for this project.