There are two types of supplied-air respirators. The first, air line respirators, provide clean air through a hose that is connected to a stationary air pump or tank. The second, a self-contained breathi g apparatus, or SCBA, has a portable air tank that is carried on the back like those worn by scuba divers and firefighters. Supplied-air respirators are undeniably very expensive to buy and maintain, and instruction and practice are necessary to use one correctly. Farmers should understand, however, that every time they enter a sealed silo or manure pit without one, they're risking their lives.
Many farmers underestimate the danger associated with such areas.
Unless you are wearing a supplied-air respirator or have the atmosphere inside the area monitored for dangerous gases, you can never be sure. Don't become a statistic. Just because you successfully entered the pit the last time doesn't mean you will this time. Once you have decided what kind of respirator you need, visit your local farm supply store, ag chemical supplier, hardware store, or industrial safety equipment company. Try on several brands and styles of respirators to see which is the most comfortable for you.