A Bunsen burner is a laboratory instrument that can be used to provide a single, continuous flame by mixing gas with air in a controlled fashion. The ratio of gas to air that is mixed together can be manually adjusted, allowing the user to control the intensity, temperature, and size of the flame. The flame can then be used to heat or sterilize laboratory reagents and equipment.
All Bunsen burners are made up of the same basic components. The barrel, or burner tube, is where the air and gas mix.
The collar, which is located at the bottom of the barrel , can be adjusted to control the air intake and the heat of the flame.