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.
LEAKS AND THE SMELL OF GAS Always be sensitive to the slightest gas smell. Learn to recognize the odor of propane gas. To become familiar with the smell of propane, call your propane dealer for a Scratch-And-Sniff brochure, and ask to smell the propane when your propane dealer fills your tank.