Fireboy-Xintex P-1B-R Marine Propane Detector The Fireboy-Xintex Marine Propane Detector is part of what you need for a complete and safe propane system. Propane is increasingly becoming more and more apart of boating from cooking to heating. Propane is heavier than air and can settle below the deck or in the bilge where it can be detonated by a spark or engine start up. Features dual LED light and 68 dBA sound alarms. Feature Current Draw 12VDC 68dBA Alarm Red LED Lights Fume Type Propane Blow