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.
The smell of gasoline is easier to get rid of than the smell of kerosene. Just keep ventilating the shop, and the smell will disappear. Gasoline is a mixture of light and heavier components with differing vapor pressures, and the light ends will first evaporate, making the most odor. The heavier ends take longer.