RF remotes generally work this way: The originating signal is sent from the remote as RF (radio frequency.) In the case of the MX-950 in my theater that's 418MHz, a very stable and reliable frequency band.
By nature, propane is clear and contains no scent at all. For safety purposes propane. companies add a substance known as ethyl-mercaptan to the propane fuel. Ethyl-. mercaptan has a strong rotten egg, or skunk-like scent, which allows the consumer to. smell it in the case of a leak.
1 Propane vapor will not cause air pollution. Propane vapor is not considered air pollution. 2  Propane vapor is not harmful if accidentally inhaled by birds, animals or people.  Propane will only cause bodily harm if liquid propane comes in contact with skin (boiling point -44Â°F).