You can use P300 in industrial emission detection, petrol chemical analysis, oil refinery analysis, electronic manufacturing monitoring, medicine production monitoring, pharmaceutical analysis, food & beverage production monitoring, leak detection, safe & security inspection, accident investigation, forensic analysis, academic research, etc. Generally speaking, you can use it in any application as long as there are VOCs (volatile organic compounds) or inorganic gases with ionization potential within 10.6 eV.