This is the most common type of weed garden sprayer, and it can come in many varieties. Often this is a tank you carry around with a long hose and wand that is used for the delivery of chemicals to the weeded area. The sprayer wand allows for proper calibration to deliver a fine spray or a coarse spray. You want to use a coarse spray in an area that needs drenching coverage, so this is far large areas of weeds. A fine spray is best used in an area where more control is needed, such as in a garden.
Air Sprayers
This type of sprayer is more of an air sprayer, and it does not use liquid chemicals. Instead, it uses a very fine powder. This type of sprayer is often used on delicate garden areas such as with blooming flowers and other plants.
Gasoline Powered Sprayers
This type of sprayer is not for the amateur gardener, as it boosts a lot of power from a gasoline powered engine. This type of sprayer is used over large areas where coverage is more important than fine control. They a e still portable, but they are often used to cover entire yards because they can do the job much faster than your average handheld sprayer. Safety can also be an issue here. Without the fine control of a hand held sprayer you will need to watch out for pets, as they can easily be affected by large swaths of weedkiller spread over your yard.
Compression Tank Sprayers
These are very similar to liquid sprayers, but they work on a compression tank system. They often com with a hand operated pump that build compression in the tank and allows for a continuous stream to be sprayed from the applicator wand. The wand has a simple handle that turns the spray on our off. Since this is a compression method, the stream from the wand gets weaker as compression decreases, so it does not remain constant without more pumping.
Back Pack Sprayers
This final type of sprayer is very similar to a compression sprayer except it fits over your shoulders like a backpack for ease in carrying. This frees up both of your hands to allow you into areas where you need to have fine control with the spray.
