Gasoline & Propane Sensor OnlyThis sensor is a replacement for Fireboy-Xintex P systems. Installation: The sensor should be located by the propane-powered appliance, near the floor Avoid areas where damage may take place due to cleaning, mopping, kicking, or other physical damage Harsh chemicals should not be used to clean sensors Use the appropriate #8 mounting hardware to mount the Propane Fume Sensor in the desired location The rubber gasket should be installed between the sensor and the mounting surface Connect to the extension cable using the attached quick-disconnect connectors (Sold Separately)