Safe-T-Alert Gas Vapor Alarm Fume Fire Bilge Water - Black Surface Mount. These Carbon Monoxide Alarms & Sensors made by Safe-T-Alert incorporate three different sensors that will detect a variety of hazards. The sensor on the Safe-T-Alert Gas Vapor Alarm w/ Fire Bilge Water and Fume Sensor has built-in technology that will alert you to smoke fire or water vapor buildup. If either of the following should happen while you are away from your boat: the boat may sink causing the flood sensor to go off and you will be alerted. A maintenance free sensor ensures you won't have to worry about replacing the sensor every few years. The Safe-T-Alert Gas Vapor Alarm with Fire and Bilge Sensors is a cost-effective solution that will give you peace of mind on your next trip. Specifications for Safe-T-Alert Gas Vapor Alarm Fume Fire Bilge Water: Manufacturer: Safe-T-Alert Color: Black Features of Safe-T-Alert Gas Vapor Alarm Fume Fire Bilge Water Cost effective technology. Smart sensor block for improved performance. Thermal Sensor. Monitors for high heat and heat from fire. Flood Sensor. Monitors bilge for high water. Package Contents: Safe-T-Alert Gas Vapor Alarm Fume Fire Bilge Water Safe-T-Alert MGD-10XL: Gas Vapor Alarm Fume Fire Bilge Water - Black Surface Mount