Bunsen burner is a gas burner used for heating substances in scientific laboratories. It consists of a metal tube on a stand and a long rubber hose that connects the tube to a gas jet. Several adjustable openings at the bottom of the tube control the amount of air that enters and mixes with the gas. The temperature of the flame is regulated by increasing or decreasing the amount of air in the tube. Because the gas mixes with air before burning, it produces a flame that is smokeless.
